The rock fell as far as 78.4 meters.
Given the following data:
Initial speed = 0 m/s (since the rock fell from rest). Final speed = 39.2 m/sWe know that the acceleration due to gravity (a) for an object is equal to 9.8 meter per seconds square.
To find how far (distance) has the rock fallen, we would use the third equation of motion;
[tex]V^2 = U^2 + 2aS[/tex]
Where:
V is the final speed. U is the initial speed. a is the acceleration. S is the distance covered.Substituting the given parameters into the formula, we have;
[tex]39.2^2 = 0^2 + 2(9.8)S\\\\1536.64 = 0 + 19.6S\\\\19.6S = 1536.64\\\\S = \frac{1536.64}{19.6}[/tex]
Distance, S = 78.4 meters.
Therefore, the rock fell as far as 78.4 meters.
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A car is traveling down the highway cruise control at 50m/s (this means its is traveling with a constant velocity NOT accelerating). If it does this for 5 minutes (300s), how far does it travel?
Given parameters:
Speed of car = 50m/s
Time of travel = 5minutes (300s)
Unknown;
Distance of travel = ?
To solve this problem, we need to understand how speed relates with distance and time.
Speed is a physical quantity. It is the distance traveled divided by time taken.
Speed = [tex]\frac{distance}{time}[/tex]
So,
Distance = speed x time
Input the parameters and solve for the distance;
Distance = 50m/s x 300s
Distance = 15000m
The distance covered during this time interval and speed is 15000m
b) A stone is dropped from the roof of a four storey building. The height of
each storey is 4.9m . Taking g =9.8m/s2 , calculate the velocity with
which the stone will hit the ground.
Answer:
9.8m/s
Explanation:
Given,
distance of each storey () = 4.9m
distance of 4 storey (s) = 19.6m
acceleration due to gravity (g) = 9.8 m/s^2
time given (t) = ?
velocity = (?)
initial velocity (u) = 0 {due to fall from certain height}
using formula,
s = ut + 1÷2at^2
s = 0 + 9.8÷2×t^2
19.6×2÷9.8 = t^2
4 = t^2
t = 2
now,
velocity ( v )= s ÷ t
v = 19.6 ÷ 2
v = 9.8 m/s
ans
what body part plays a strong role in releasing power
Answer:
I think your bones, muscles, and joints your welcome :)
Explanation:
Does anybody know anything about speed and velocity? im hella stuck.
Answer:
lm.ao i was stuck too when i was on that
Explanation:
what u need to know sis?
speed, being a scalar quantity, is the rate at which an object covers distance. The average speed is the distance (a scalar quantity) per time ratio. Speed is ignorant of direction. On the other hand, velocity is a vector quantity; it is direction-aware. Velocity is the rate at which the position changes.
Determine the initial velocity of a marble that lands 1.8m away from a tabletop that is 0.8m from the ground.
Acceleration due to gravity = 9.85
0 2.25 m/s
2.6 m/s
0 1.8 m/s
4.5 m/s
Answer:
4.5 m/s
Explanation:
[tex]s_x[/tex] = Horizontal displacement = 1.8 m
[tex]s_y[/tex] = Vertical displacement = 0.8 m
[tex]u_x[/tex] = Horizontal velocity
g = Acceleration due to gravity = [tex]9.81\ \text{m/s}^2[/tex]
t = Time taken to fall down
[tex]s_y=u_yt+\dfrac{1}{2}gt^2\\\Rightarrow 0.8=0+\dfrac{1}{2}\times 9.8\times t^2\\\Rightarrow t=\sqrt{\dfrac{2\times 0.8}{9.8}}\\\Rightarrow t=0.4\ \text{s}[/tex]
[tex]s_x=u_xt+\dfrac{1}{2}a_xt^2\\\Rightarrow 1.8=u_x\times 0.4+0\\\Rightarrow u_x=\dfrac{1.8}{0.4}\\\Rightarrow u_x=4.5\ \text{m/s}[/tex]
The initial velocity of the marble is 4.5 m/s.
Solve.
h ÷ 4 = 9
h =
It is required to design a zener shunt regulator to provide a regulated voltage of about 10 V. The available 10-V, 1-W zener of type 1N4740 is specified to have a 10-V drop at a test current of 25 mA. At this current, its r z is 7 . The raw supply, V S , available has a nominal value of 20 V but can vary by as much as ±25%. The regulator is required to supply a load current of 0 mA to 20 mA. Design for a minimum zener current of 5 mA.
Answer:
jgfsdghjjuk
Explanation:
khhnghjj
An____ collision occurs when an arrow hits the target.
Answer:
I think it's An inelastic collision occurs when an arrow hits the target because when the arrow hits it, the target and the arrow do not bounce away from each other.
Explanation:
What is the velocity of a car that travelled a total of 75 km north in 1.5 hrs?
Which of these is formed by a hot spot in Earth's crust?
Answer:
we need to know what the choices are?
Explanation:
Answer:
A hot spot is a region deep within the Earth's mantle from which heat rises through the process of convection. This heat facilitates the melting of rock. The melted rock, known as magma, often pushes through cracks in the crust to form volcanoes.
a dog walks 14 meters to the east and then 20 meters back to the west.
Answer:
who gets theses questions XD
Explanation:
what does it mean mechanical advange is less than one?
Answer:
this happens when the input force is greater than the output force
HOPE IT HELPED YOU...
________are muscles connected to the skeleton.
1.) Smooth muscles
2.) Skeletal muscles
3.) Strong muscles
4.) Cardiac muscles
Answer: Skeletal Muscles
Explanation:
Skeletal muscles are attached to the skeleton by tough connective tissues called tendons
If the radio waves that are sent from the speed gun have a frequency of 400,000,002 Hz and the radio waves reflected off an approaching car have a frequency of 400,000,109 Hz, what is the speed of the car? (Hz is the SI unit of frequency, equal to cycles per second).
Answer:
40.1 m/s or 144.36 km/h
Explanation:
The equation is (v=∆ f/f) x (c/2)
V is velocity
delta f is returned frequency minus intial frequency divided by the initial frequency
c is the speed of light in m/s divided by 2
v= (400,000,109 Hz - 400,000,002 Hz)/400,000,002Hz x (299,792,458 m/s)/2
An athlete starts running from rest such that he covers a distance of 5mm in 0.50s with a constant change in velocity per unit time . when will he reach the finish line, if he is running a race of 50m?
Answer:
50 s
Explanation:
Given:
Δx = 0.005 m
v₀ = 0 m/s
t = 0.50 s
Find: a
Δx = v₀ t + ½ at²
0.005 m = (0 m/s) (0.50 s) + ½ a (0.50 s)²
a = 0.04 m/s²
Given:
Δx = 50 m
v₀ = 0 m/s
a = 0.04 m/s²
Find: t
Δx = v₀ t + ½ at²
50 m = (0 m/s) t + ½ (0.04 m/s²) t²
t = 50 s
Do Now: You are asked to go to downtown Newark and pick up a small bag of materials for a grant project. Pay is $25. The materials will be delivered to Room 224, 2nd floor in Barringer High School. Create a numbered procedure, a list of steps that you will take to pick up and deliver the materials. Click for Example
Answer:
sorry im not in physics
Explanation:
1
Two beaker of water A and B , initially are at the same temperature.The temperature of the
water in beaker A is increased by 10F and the temperature of water in beaker B is increased
10 K. After these temperature change,which beaker of water has the higher temperature?
Answer :
beaker A , it is because the temperature increases is higher than beaker B.
Formula
(10°F − 32) × 5/9 + 273.15 = 260.928K
10 degrees fahrenheit = 260.928 kelvins
Formula
(10K − 273.15) × 9/5 + 32 = -441.7°F
10 kelvins = -441.67 degrees fahrenheit
beaker A , 10°F = -12.222 °C
beaker B , 10k = -263.15 °C
Beaker A of water will have a higher temperature than the temperature of beaker B.
How to change the temperature from Fahrenheit to Celcius?To convert the temperature Fahrenheit to Celsius formula is used from the scale Fahrenheit to Celsius. Both scales provide a way to measure the object’s hotness and coldness and are used to measure the temperature. The symbol used to express Fahrenheit is °F while the symbol used for Celsius is °C.
The formula used to change the temperature from Fahrenheit to Celsius as follows:
°C = (°F- 32)5/9
The temperature of beaker A is increased by 10°F. So the change in temperature in the Celcius scale is :
T(°C) = (10- 32)5/9
T(°C) = -12.22°C
The temperature of beaker B is increased by 10 K, then the temperature in Celcius is:
T(°C) = 10 - 273.15
T(°C) = - 263.15°C
Therefore, the temperature of beaker A will be higher after these changes if initially, both are at the same temperature.
Learn more about Fahrenheit and Celcius, here:
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A 80.0kg football player running at 12.5 m/s North runs into a 120.kg player running South. The 120.kg player grabs the other one so they move together at -4.50m/s. What was the velocity of the 120.kg player?
Answer:
p=-540kg•m/s
Explanation:
because I used a calc
Which two quantities can be used to describe motion?
A. Displacement and velocity
B. Displacement and weight
C. Speed and weight
D. Velocity and mass
Displacement and velocity are the two quantities that can be used to describe motion.
What are the quantities used to describe motion?Motion is defined in terms of displacement, time, velocity, and acceleration. Velocity is defined as the rate of change of displacement whereas acceleration is defined as the rate of change of velocity.
Most of the quantities used to describe motion can be categorized as vectors or scalars. A vector is a quantity that is described by both magnitude and direction whereas a scalar is a quantity that is described by magnitude only.
The motion of an object can be defined as Uniform motion which means equal distance is covered in equal time and a non-uniform motion means an equal distance is covered by an object in equal intervals of time.
So we can conclude that option A is the correct answer.
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A physical quantity that has both magnitude and a direction is the definition of
Explanation:
Vector, in physics, a quantity that has both magnitude and direction. It is typically represented by an arrow whose direction is the same as that of the quantity and whose length is proportional to the quantity's magnitude.
Explain Kinetic and potential energy
Answer:
Energy implies as the object’s capability to perform work. It is something that cannot be created or destroyed but can only be transformed. An object loses its energy, when it performs work, whereas it gains energy when the work is performed on it. Energy is broadly classified as kinetic energy and potential energy. While kinetic energy is the energy which an object contains because of a particular motion.
On the other hand, potential energy is the stored energy, because of its state of rest. As both the two forms of energy are measured in joules, people get easily confused between these two. So, take a read of the article which will help you to understand the differences between kinetic and potential energy.
Explanation:
Hope this helps - Good luck ^w
Answer:
Energy stored in an object due to its position is Potential Energy. · Energy that a moving object has due to its motion is Kinetic Energy.
Explanation:
What is the magnitude of the resultant vector? Round your answer to the nearest tenth
Answer:13.9 on edgy I just did it
Explanation:
Answer:
13.9
Explanation:
just did it
33. A zebra is at rest 60 m away from a charging lion
running at 20 m/s. If the zebra accelerates at 4
m/s2, will the lion catch it?
Answer:
the lion will miss the zebra by 3 meters
Explanation
The zebra has gone 23.75m after 5 seconds
and the lion can only go 20 m/s
The lion can not catch zebra.
A diagram is attached below which describe situation of question.
The speed of Zebra is,
[tex]v=u+at=0+4t=4t[/tex]
Where u is initial speed of zebra.
The speed of lion is 20m/s.
The lead in speed by lion for every second is [tex](20-4t)[/tex].
[tex](20-4t)*t=60\\\\20t-4t^{2}=60\\ \\t^{2}-5t+15=0\\ \\t=\frac{5\pm\sqrt{(-35)} }{2}[/tex]
Here time is imaginary.
Therefore, The lion can not catch zebra.
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______________ rock forms beneath Earth's surface.
Answer:
Igneous rocks form beneath Earth's surface.
Explanation:
Igneous rocks form beneath the Earth's surface
Q7 Describe two types of atomic change that produce electromagnetic
waves.
Se lanza una piedra de 3.00 N verticalmente hacia arriba desde el suelo. Se observa que, cuando está 15.0 m sobre el suelo, viaja a 25.0 m/s hacia arriba. Use el teorema trabajo-energía para determinar a) su rapidez en el momento de ser lanzada. b) su altura máxima
Answer:
(a). The speed at the moment of being thrown is 30.41 m/s.
(b). The maximum height is 47.18 m.
Explanation:
Given that,
Weight of stone = 3.00 N
Height = 15 m
Speed = 25.0 m/s
(a). We need to calculate the speed at the moment of being thrown
Using work energy theorem
[tex]W=\dfrac{1}{2}m(v_{2}^2-v_{1}^2)[/tex]
[tex]-mg\times d=\dfrac{1}{2}m(v_{2}^2-v_{1}^2)[/tex]
Put the value into the formula
[tex]-9.8\times15=\dfrac{1}{2}\times(v_{2}^2-v_{1}^2)[/tex]
[tex]-2\times9.8\times15=25^2-v_{1}^2[/tex]
[tex]-v_{1}^2=-300-25^2[/tex]
[tex]v_{1}=\sqrt{925}[/tex]
[tex]v_{1}=30.41\ m/s[/tex]
(b). We need to calculate the maximum height
Using work energy theorem
[tex][tex]W=\dfrac{1}{2}mv_{2}^2-\dfrac{1}{2}mv_{1}^2[/tex]
[tex]mg\times d=\dfrac{1}{2}mv_{2}^2-\dfrac{1}{2}mv_{1}^2[/tex]
Here, [tex]\dfrac{1}{2}mv_{2}^2[/tex]=0
[tex]-(mg)\times d=\dfrac{1}{2}mv_{1}^2[/tex]
[tex]d=\dfrac{v_{1}^2}{2g}[/tex]
Put the value into the formula
[tex]d=\dfrac{30.41^2}{2\times9.8}[/tex]
[tex]d=47.18\ m[/tex]
Hence, (a). The speed at the moment of being thrown is 30.41 m/s.
(b). The maximum height is 47.18 m.
8. An object accelerates 12.0 m/s2 when a force of 6.0 newtons is applied to it. What is the mass of the object? ___________________________
Answer:
Mass of object is 0.5kg
Explanation:
Given the following data;
Force = 6N
Acceleration = 12m/s²
Mass =?
Force is given by the multiplication of mass and acceleration.
Mathematically, Force is;
[tex] F = ma[/tex]
Where;
F represents force.
m represents the mass of an object.
a represents acceleration.
Making mass (m) the subject, we have;
[tex]Mass (m) = \frac{F}{a}[/tex]
Substituting into the equation;
[tex]Mass (m) = \frac{6}{12}[/tex]
Mass, m = 0.5kg.
Therefore, the mass of the object is 0.5kg
A car is driving at 35 m/s. It decides to accelerate at 4.5 m/s2 for 3 seconds. How fast is it now moving?
Please show work even if you are an online student. I know it takes time, but I promise it is worth it.
I have included the units in the answer already. Please only put the number round all answers to 2 decimal places
if possible.
final velocity =
m/s
Blank 1
Next Page
6
? ? ?
Answer:
48.5
Explanation:
vf = vi + at
vf = 35 + 4.5(3)
vf = 35 + 13.5
vf = 48.5 m/s
Name any two medium which states about the weather report.
Answer:
1. Government Agencies
2. Television Stations
Explanation:
Weather reports are needed by members of the public to be alert on daily and future weather trends as this would affect how they arrange their affairs. The weather can affect daily movement. For example, when it rains heavily, movement might become limited. Government agencies such as the National Weather Service (NWS), state the weather report.
Television channels like the Cable News Network have programs dedicated to weather reporting. The reporter states what the weather would be like in different cities and the public take note of that.
a book has a mass of 50 kg and an acceleration of 5 m/s/s. what is the force of the book
help asap
Answer:
250 N
Explanation:
F=ma
F=50 kg(5 m/s/s)
F=250 N
Answer:
F=250N
Explanation:
I hope this helps you out and if your feeling generous plz mark brainliest it helps me a lot thank you:)