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ivolga24 [154]
3 years ago
11

What force is required to accelerate a 385 kg couch at 0.2 m/s^2 ?

Physics
1 answer:
Juliette [100K]3 years ago
6 0

Answer:

It takes 77 N

Explanation:

Using Newton's second law of motion, F=ma (Force equals mass times acceleration. Since the mass of the couch is 385 kg and the target acceleration is 0.2 m/s, you simply multiply mass times acceleration (ma) to get the total force, or 77 N.

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B. the hockey player is moving at a speed of 9. 5 m/s. if it takes him 2 seconds to come to a stop under constant acceleration,
balu736 [363]

The hockey player is moving at a speed of 9. 5 m/s. if it takes him 2 seconds to come to a stop under constant acceleration, will be s = 9.5 m.

The branch of physics that defines motion with respect to space and time, ignoring the cause of that motion, is known as kinematics. Kinematics equations are a set of equations that can derive an unknown aspect of a body’s motion if the other aspects are provided.

These equations link five kinematic variables:

Displacement (denoted by Δx)

Initial Velocity v0

Final Velocity denoted by v

Time interval (denoted by t)

Constant acceleration (denoted by a)

These equations define motion at either constant velocity or at constant acceleration. Because kinematics equations are only applicable at a constant acceleration or a constant speed, we cannot use them if either of the two is changing.

v = u + at

0 = 9.5 + a (2)

a = - 9.5 /2  m/s^{2}

v^{2} = u^{2} + 2as

0 =  (9.5)^{2} + 2* (- 9.5 /2) * s

-  (9.5)^{2}  = - 9.5 s

s = 9.5 m

To learn more about kinematics here

brainly.com/question/27126557

#SPJ4

3 0
2 years ago
An automobile moves on a level horizontal road in a circle of radius 30 m. The coefficient of
blondinia [14]

Answer:

v = 12.12 m/s      

Explanation:

It is given that,

Radius of circle, r = 30 m

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The centripetal force is balanced by the force of friction such that,

v = 12.12 m/s

So, the maximum speed with which this car can round this curve is 12.12 m/s. Hence, this is the required solution.

5 0
4 years ago
after stating a hypothesis, what is thew next step that a physicist is most likwely to take in answering a question
kifflom [539]

Answer:

Planning and performing an experiment to answer the question.

Explanation:

5 0
3 years ago
Help quick! Plz dont add an answer if you dont know
Bezzdna [24]

Answer:

One reason is the positioning of the earth on its axis. The sun doesn't hit where we live in winter because we are pushed upwards more so we don't get the suns heat. The sun goes down earlier... so we don't have as much sunlight.

In winter the sun is father away from earth and in Summer it is closer...

Explanation:

8 0
3 years ago
If an object with constant mass is accelerating, what does Newton's second
aliina [53]

Answer:

C. A force must be acting on the object.

Explanation:

This is due to the action of its momentum direction.

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6 0
3 years ago
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