Answer:
Please find the answer in the explanation
Explanation:
Friction is a force that opposes motion. One or two of the advantages of friction are break and ability of an object to walk.
Writing yes it is useful because when your writing because friction helps you see what your writing
ii. Rubbing. Yes, it is useful.
friction make it possible for two object to rub each other
iii. Skiing. No. It is not useful because With presence of friction, skiing will not be possible.
iv. Rotating a wheel No. It is not useful because Friction will oppose the rotation of the wheel.
An airport has runways only 145 m long. A small plane must reach a ground speed of 44 m/s before it can become airborne. What average acceleration must the plane’s engines provide if it is to take off safely from its airport?
Answer:
The value is [tex]a = 6.676 \ m/s^2[/tex]
Explanation:
From the question we are told that
The length of the runways is [tex]l =145 \ m[/tex]
The required ground of a small plane is [tex]v = 44 \ m/s[/tex]
Generally from kinematics equation
[tex]v^2 = u^2 + 2as[/tex]
Here u is the initial speed of the plane which is 0 m/s
so
[tex]44^2 = 0^2 + 2 * a* 145[/tex]
=> [tex]a = 6.676 \ m/s^2[/tex]
on a standard position vs time graph, the distance between two points on the horizontal axis represents the time interval, and the distance between two points on the vertical axis is the displacement. the slope of the line represents the average velocity
Answer: true
Explanation: I got the question and guessed true and it was right
a jogger runs a distance of 100m and accomplished his feat in 30secs . What was his speed?
Answer:
His speed was 3.3
Explanation:
To find his speed all you have to do is to divide his distance ÷ time. Since your solving for speed all you do is divide distance ÷ time to find out your speed.
In the example of jumping off a chair, what is the impulse that will stop your fall?
Answer:
You will reach both your arms out to break your fall and save your head.
Explanation:
It common sense you don't want your head injured. Do you?
Physics question I have a test Friday
Answer:c
Explanation:
Please answer this question and give a justification.
how much gravitational potential energy does a 5 kg rock have if is sitting on the edge of a cliff that is 10m high
Answer:
500.................A car is travel with velocity of 150 km/hr east. It traveled a distance of 500 km. How long did it travel for.
Explanation:
V= s / t
150 km/hr = 500 km / t
t = 500 km ÷ 150 km/hr
t = 10/3 hr (3 hrs 19 mins 49 sec)?
I'm not sure tho^^
Answer:
[tex]\boxed {\tt \frac{10}{3} \ hours}[/tex]
Explanation:
Time can be found by dividing the distance by the velocity. Use the following formula:
[tex]t=\frac{d}{v}[/tex]
The distance traveled was 500 kilometers. The velocity is 150 kilometers per hour.
[tex]d= 500 \ km \\v= 150 \ km/hr[/tex]
[tex]t=\frac{500 \ km} {150 \ km/hr}[/tex]
Divide. Note that the kilometers, or km, will cancel each other out.
[tex]t=\frac{500 \ }{150 \ hr}[/tex]
[tex]t=\frac{10}{3} \ hr[/tex]
[tex]t=3.3333333 \ hr[/tex]
The car traveled for 10/3 or 3.3333 hours
1. If I travel 50 miles in 5minutes, how fast am I going?
Answer:
10 miles a min
Explanation:
math
Miranda drives her car clockwise around a circular track of radius 25 m. She
completes 13 laps around the track in 5 minutes. Find Miranda's total distance
traveled
What is the wavelength of a water wave that is moving at 12 m/s with a frequency of 3 Hz?
Answer:
it is 4m
Explanation:
Can someone please help me, thanks.
Which statement explains what happens to older crust during seafloor spreading?
It is destroyed at coastlines.
It moves under continents.
It is destroyed at a mid-ocean ridge.
It moves away from a mid-ocean ridge.
Answer:
the last one, It moves away from a mid-ocean ridge.
Answer:
D
Explanation:
BabaBooey
Usain Bolt accelerates at a rate of 3.7
m/s2 and his top speed is 12.7 m/s. How
long does it take for him to run the 100m
dash based on these numbers
Answer:
Explanation:
I think that you to run more than 12 miles
Which of the following is an example of Newton’s 1 st Law? a. Using a force to push a box b. Pulling back an arrow to shoot it forward c. A table remains motionless in a classroom d. None of the above
Answer:
C.
Explanation:
Newton's 1st law states that an object at rest will stay at rest until acted upon by an external force.
Answer:
C is the answer for the question
Why doesn't the moon hit Earth's
surface?
Speed is
O B. zero for objects at rest
D. all of the above
C.a measure of how quickly an object gets from one place to another
O A. calculated by dividing the distance traveled by the time taken
Answer: zero for objects at rest
Explanation:
Answer:
D. all of the above all are correct one.
Calculate the potential energy of a rock with a mass of 5 kg while sitting on a cliff that is 30
m high
solution.
given,
mass= 5kg
height= 30m
acceleration =9.8m/s^2 or 10m/s^2
P.E=mgh
=5×30×10
=1500 joule.
What are the variables do you think to be considered to determine the acceleration of an object?
How are doctors both accurate and precise when preforming surgery or other things?
Answer:
learning about the different functions of the body and therefore they have enough practice in order to have a clean and safe operation
Explanation:
find the weight of the following mass;
(a) 220g
please show the formula
Explanation:
weight=mass*gravity
w=mg
first change 220g to kg like this
1kg=1000g
?=220g
1kg*220g/1000kg=220/1000g
mass =0.22kg
now we can continue
w=0.22kg*10m/s^2 or w=0.22kg*10N/kg
=2.2N =2.2N
hope it helps you
Explain Newton's 2nd Law of Gravity in your own words ?
Answer:
The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object.
Of all the health and wellness careers, which one has the least opportunity for future job growth?
A. physical therapist
B. sports physician
C. nutritionist
D. group fitness instructor
Answer:
The answer is c.nutritionist
Explanation:
because they are a g
Of all the health and wellness careers, the one has least opportunity for future job growth is nutritionist. The correct option is C.
What is career?Career is the most important phase of one's life. This helps a person financially independent by doing job or business.
Currently fitness is all over the people's mind. But the career as a nutritionist has less important or less interest.
Thus, the one has least opportunity for future job growth is nutritionist.
Learn more about career.
https://brainly.com/question/2160579
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The BMW has an 85L tank while the Cadillac has a 25 gallon tank. Which one has the larger tank?
85 Liters would be around 19 to 20 gallons so it's most likely the Cadillac
If The BMW has an 85 L tank while the Cadillac has a 25-gallon tank then the Cadillac would have a larger tank because its 25-gallon tank would be equivalent to 94.635 liters.
What is density?It can be defined as the mass of any object or body per unit volume of the particular object or body. Generally, it is expressed as in gram per cm³ or kilogram per meter³.
As given in the problem, the BMW has an 85L tank while the Cadillac has a 25-gallon tank,
1 gallon = 3.7854 liter
25 gallons = 25× 3.7854
= 94.635 liters
If the Cadillac had a 25-gallon tank compared to the BMW's 85-liter tank, the Cadillac would have a larger tank since 25-gallon tanks are equivalent to 94.635 liters.
Learn more about density from here,
brainly.com/question/15164682
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what is the volume of a bar of soap that is 9 cm long, 5 cm wide, and 2 cm high?
Answer: 90
Explanation: To find volume, you multiply length x width x height. 9*5*2=90.
i will give u brainliest!
Answer:
True
Explanation:
idk
8. What are elastic and inelastic collisions?
An elastic collision is a collision in which there is no net loss in kinetic energy in the system as a result of the collision. Both momentum and kinetic energy are conserved quantities in elastic collisions.
An inelastic collision is a collision in which there is a loss of kinetic energy. While momentum of the system is conserved in an inelastic collision, kinetic energy is not. This is because some kinetic energy had been transferred to something else.
Which two objects in space formed from the huge disk of ice and debris beyond the outer planets? A. Pluto and comets B. comets and Neptune C. Neptune and a solar nebula D. a solar nebula and planetesimals
Answer:
A: Pluto and comets.
Explanation:
If two objects with static charge are attracted what do you know about them?
If an object was accelerating at 10 m/s2, and a mass of 1 kg, what was size of the force acting on the object?
20 Newtons
10 Newtons
1 Newton
5 Newtons
Answer:
10 N
Explanation:
[tex]f = ma[/tex]
= 10m/s^2 * 1 kg
=10N