The initial horizontal velocity of the projectile is 22.1 m/s.
The given parameters;
height of the projectile, h = 25 mhorizontal distance of the object, R = 50 mThe time of motion of the object is calculated as follows;
h = ut + ¹/₂gt²
where;
u is the initial vertical velocity = 0h = ¹/₂gt²
[tex]t = \sqrt{\frac{2h}{g} } \\\\t = \sqrt{\frac{2\times 25}{9.8} } \\\\t = 2.26 \ s[/tex]
The initial horizontal velocity of the projectile is calculated as follows;
R = vₓt
[tex]v_x = \frac{R}{t} \\\\v_x = \frac{50}{2.26} \\\\v_x = 22.1 \ m/s[/tex]
Thus, the initial horizontal velocity of the projectile is 22.1 m/s.
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Two coins, made of different material, are placed next to each other so that they are touching. Both coins are 15mm in diameter. One coin has a mass of 6.5 g and the gravitational force between the coins is 4.03 × 10^-11 N
The mass of the second coin for the given gravitation force is 20.9 g.
The given parameters;
distance between the two coins, r = 15 mm = 0.015 mmass of one coin, m₁ = 6.5 g = 0.0065 kggravitational force between the coins = 4.03 × 10⁻¹¹ NThe mass of the second coin is determined by applying Newton's law of universal gravitation as shown below;
[tex]F = \frac{Gm_1 m_2 }{R^2} \\\\m_2 = \frac{FR^2}{Gm_1} \\\\m_2 = \frac{(4.03 \times 10^{-11}) \times (0.015)^2}{(6.67 \times 10^{-11}) \times (0.0065)} \\\\m_2 = 0.0209 \ kg\\\\m_2 = 20.9 \ g[/tex]
Thus, the mass of the second coin for the given gravitation force is 20.9 g.
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a football quarterback throws a football. after it leaves his hand, what forces are acting on the football? choose all that apply.
golekeeper
Explanation:
because they use hand to save keeper
Why is it easier to cut meat with a sharp knife than with a blunt knife
Answer:
because the knife is sharp
Answer:
Pressure is inversely proportional to the area of the surface. While a blunt knife has more area coming in contact than a sharp knife and the pressure exerted by the blunt knife will be less as compared to that of a sharp knife. Therefore it is easier to cut with a sharp knife.
Explanation:
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Explain how the basic units are combined to give the derived units of force, velocity and pressure and work
#Force
[tex]\\ \sf\longmapsto Force=Mass\times Acceleration [/tex]
[tex]\\ \sf\longmapsto Force=kg m/s^2[/tex]
[tex]\\ \sf\longmapsto Force=Newton (N)[/tex]
#Velocity
[tex]\\ \sf\longmapsto Velocity=\dfrac{Displacement}{time}[/tex]
[tex]\\ \sf\longmapsto Velocity=m/s[/tex]
#Work
[tex]\\ \sf\longmapsto Work=Force\times Displacement [/tex]
[tex]\\ \sf\longmapsto Work=Nm[/tex]
[tex]\\ \sf\longmapsto Work=Joules(J)[/tex]
9- Where did Rutherford propose that most of the mass of an atom
resided?
a) In the middle of the atom
b) Along the edge of the atom
c) Scattered throughout the atom
d) Orbiting around the atom
Answer:
A) in the middle of the atom
Explanation:
He concluded that all of the positive charge and the majority of the mass of the atom must be concentrated in a very small space in the atom's interior, which he called the nucleus.
Using parallax, what is the distance to the
farthest stars you can measure?
In order for work to be done, what three things are necessary?
Answer:
force, displacement & cause.
Explanation:
there must be a displacement and the force must cause the displacement.
i hope this helps you ahh
The horizontal surface on which the block of mass 2.2 kg slides is frictionless. The force of 27 N acts on the block in a horizontal direction and the force of 81 N acts on the block at an angle as shown below is the magnitude of the resulting ac celeration of the block? The acceleration of gravity is 9.8 m/s ^ 2
The magnitude of the resulting acceleration of the block is 6.14 m/s².
The given parameters;
mass of the block, m = 2.2 kghorizontal force on the block, F = 27 Nforce below the horizontal, 81 N at 60⁰The net horizontal force on the block is calculated as follows;
[tex]F_x = 27 \ - 81 \times cos (60)\\\\F_x = -13.5 \ N[/tex]
The acceleration of the block is calculated as follows;
[tex]a = \frac{-13.5}{2.2} \\\\a = - 6.14 \ m/s^2\\\\a = 6.14 \ m/s^2 \ to \ the \ left[/tex]
Thus, the magnitude of the resulting acceleration of the block is 6.14 m/s².
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A 130 N horizontal force keeps a 30 kg chair moving at a constant velocity. Find the coefficient of kinetic friction between the chair and the floor.
The coefficient of kinetic friction between the chair and the floor is 0.44.
Given the following data:
Horizontal force = 130 NMass of chair = 30 kgWe know that the acceleration due to gravity (g) of an object on planet Earth is equal to 9.8 [tex]m/s^2[/tex]
To find coefficient of kinetic friction between the chair and the floor:
Mathematically, the coefficient of kinetic friction between two objects is given by the formula;
[tex]u = \frac{F_k}{mg}\\\\u = \frac{130}{30[9.8]}\\\\u = \frac{130}{294}[/tex]
Coefficient of kinetic friction, u = 0.44.
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Which of the following best defines the definition of a Newton (N)? *
0/1
The amount of force that would give a mass of one kilogram an acceleration of one meter per second per second
Kg * m/s².
Both answers above are correct.
A cookie with a fig fruit filling
One Newton can be defined as the amount of force that would give a mass of one kilogram an acceleration of one meter per second per second.
What is force?The definition of force in physics is: The push or pull on a massed object changes its velocity.
An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.
A spring balance can be used to calculate the Force. Newton is the SI unit of force.
From Newton's second law of motion: we know that:
Force = mass × acceleration
Now in SI system:
Unit of force is Newton.
Unit of mass is kg and unit of acceleration is meter per square second.
Hence, one Newton force can be defined as:
The required force to generate 1 meter per square second acceleration on an object of mass one kilogram.
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Which statement is true about vectors?
Answer:
Vectors are defined as quantities which are fully described by both their magnitude and direction. By definition, a vector has a direction associated with it.
Explanation:
is this what you want?
Suppose you have a pendulum clock that keeps correct time on Earth (acceleration due to
gravity = 9.8 m/s
2
). Without changing the clock, you take it to the Moon (acceleration due to
gravity = 1.6 m/s
2
). For every hour interval (on Earth) the Moon clock will record
Which does not take the direction of the motion into account?
Displacement
Distance
velocity
Velocity and displacement take direction of motion into account while distance does not take direction of motion into account.
Vector quantities take into account both magnitude and direction of motion while scalar quantities only take the magnitude of motion into account. In describing the motion of an object, we use terms such as; velocity, distance, displacement etc.
Looking at the options provided in the question, displacement and velocity are vectors hence they take the direction of motion into account. Distance is a scalar quantity hence it does not take direction of motion into account.
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who invented the first telescope
Answer:
Hans Lipperhey
....................................
Why should anybody care about sexual harassment?
Answer:
Explanation:
People should care about sexual harassment for many reasons. such as, sexual harassment is a very serious and touchy topic. Sexual harassment should not be tolerated and can ruin many peoples mental health.
ILL GIVE U BRAINLIEST!! help me
one or two sentences state whether you would expect the conditions to be a greater hazard for diversity dive down where is the return to the surface and explain your production in terms of gases define prescient
Answer:
Solubility in gasses and liquids increase as pressure increases. This is due to colligative properties. The nitrogen gas levels would increase the farther the diver dives due to the increase of pressure causing the solubility of the nitrogen to increase, thus increasing the amount of it as you go deeper in the ocean.
Explanation:
As they plummet down, the driver would be in more risk. The solubility of gases and liquids increases as pressure increases. This is due to the existence of colligative properties. The nitrogen gas levels grow when the diver descends further into the water due to increased pressure, which causes the nitrogen's solubility to rise, increasing the amount of nitrogen present.
Use the velocity vs time graph to analyze the motion of the object.
Explanation:
the object has constant velocity for 2 seconds and it get a constant accelration (2ms-2)
List the three main regions of the cells in the human body. Describe the main functions of each region.
at what speed does a tropical storm become a hurricane
Answer:
74 mph is the answer
Explanation:
Physics - Vectors-- Could you help me please?
Answer:
please share the question
Explanation:
A measurement has high
when it is very close to the
true value?
Answer:
Accuracy
Explanation:
Accuracy means making measurements that are close to the value precision means making measurement that are close in value to eachother but not necessarily close to the true value.
I hope this helps! If not sorry.
physics
what are the two correct choices??
choice1
- insulating
- neutral
- large
- conductive
choice2
- potential energy
- potential difference
- charge
- electric potential
Answer:
3 and 2
May be
ok may be subscribeIsenberg Isenberg Ignatius
What does a higher value of k and a lower value of k tell about the strength of the spring? (Hint: In which case is it soft or stiff?)
Answer:
' In layman's terms, the k variable in Hooke's law (F = -kx) indicates stiffness and strength. The higher the value of k, the more force is needed to stretch an object to a given length. This value is dependent on the object's material alongside its shape and Proportons
Explanation:
the total amount of power that a star radiates is called its
SCIENCE quantity that are obtained or derived from basic quantity are called
Explanation:
they are called derived quantities. which includes:
pressure, stress, work, acceleration, velocity,density,force
A book is to be produced with pages of thickness 0.125mm.If the book is to be exactly 1cm thick what is the maximum number of pages it can contain?
Answer:
1cm=10mm
10cm/0.125mm
80pages
Which is the best definition to describe a transfer of energy?
a)Changing energy from one form to another
b)The ability to do work and cause change
c)Stored energy or energy of position
d)The same form of energy moving from one place to another
Answer:
a
Explanation:
How quickly would the 50kg box accelerate if the person applied a 580N force?
Answer:
11.6 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
f is the force
m is the mass
From the question we have
[tex]a = \frac{580}{50} = 11.6 \\ [/tex]
We have the final answer as
11.6 m/s²Hope this helps you
According to this graph, the acceleration
is approximately:
Velocity (m/s)
MN
0
1 2 3 4
Time t(s)
5
A. 4 m/s2
B. 2 m/s2
C. 1 m/s2
D. 3 m/s2
Answer:
1 m/s^2
Explanation:
a=(v-u)/t
where,
a=acceleration
v=final velocity
u=initial velocity
(4.5-0)/4.5
1 m/s^2
please helpppp 12 points