Motion Test - 6...

A body loses half of its velocity on penetrating $$6\ cm$$ in a wooden block. How much will it penetrate more before coming to rest?

A space shuttle is launched into space. During the first 8 minutes of its launch the average acceleration of the shuttle is $$17.5 m s^{-2}$$. What is its speed after 8 minutes?

A bike accelerates uniformly from rest to a speed of 7.10 m $$s^{-1}$$ over a distance of 35.4 m. Determine the acceleration of the bike.

The velocity graphs pictured below represent the motions of five different colored objects of identical mass, with the color of the graph corresponding to the color of the object.
What is the order of objects, according to the magnitudes of the net forces they are experiencing during the time represented by their graphs, greatest first?

The speed of a car reduces from 15 m $$s^{-1}$$ to 5 m $$s^{-1}$$ over a displacement of 10 m. What is the retardation of the car?

A race car accelerates uniformly from $$18.5 m/s$$ to $$46.1 m/s$$ in $$2.47$$ seconds. Determine the acceleration of the car. (in $$m/s^2$$)

How long does it take for the ball to strike the ground?

Read the following statements and state whether they are True or False:
i) If $$u$$ and $$a$$ both are negative, motion is only retarded.
ii) If $$u$$ is negative but $$a$$ is positive, then displacement of the particle can never be positive.
iii) If u is positive but $$a$$ is negative particle comes to rest for a moment at some time but if $$u$$ is negative and $$a$$ positive it never comes to rest.

Rocket-powered sleds are used to test the human response to acceleration. If a rocket-powered sled is accelerated to a speed of $$444 m/s$$ in $$1.83$$ seconds, then what is the acceleration? (in $$m/s^2$$)

What will be ratio of speed in first two seconds to the speed in next 4 s?