A batsman hits a cricket ball which then rolls on a level ground. After covering a short distance, the ball comes to rest. The ball slows a stop because: (a)The batsman did not hit the ball hard enough.(b)Velocity is proportional to the force exerted on the ball.(c)These is a force on the ball opposing the motion.(d) These is no unbalanced force on the ball, so the ball would want to come to rest.

Question:

A batsman hits a cricket ball which then rolls on a level ground. After covering a short distance, the ball comes to rest. The ball slows a stop because:

(a) The batsman did not hit the ball hard enough.

(b) Velocity is proportional to the force exerted on the ball.

(d) There is no unbalanced force on the ball, so the ball would want to come to rest.

Answer:

Explanation of unbalanced force

The unbalanced force can be understood by the following experiment.

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Chapter 8 NCERT Class 9 Science SOLUTIONS

Question:

Answer:

More NCERT Questions

An object of mass 100 kg is accelerated uniformly from a velocity of 5 ms–1 to 8 ms–1 in 6 s. Calculate the initial and final momentum of the object. Also find, the magnitude of the force exerted on the object.

An object of mass 100 kg is accelerated uniformly from a velocity of 5 ms–1 to 8 ms–1 in 6 s. Calculate the initial and final momentum of the object. Also find, the magnitude of the force exerted on the object.

A hockey ball of mass 200 g travelling at 10 ms–1. It struck by a hockey stick so as to return. It along it's original path with a velocity at 5 ms–1. Calculate the change of momentum occurred in the motion of the hockey ball by the force applied by the hockey stick.

Using a horizontal force of 200 N, we intend to move a wooden cabinet across a floor at a constant velocity. What is the friction force that will be exerted on the cabinet?

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Explain why some of the leaves may get detached from a tree if we vigorously shake its branch.

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Chapter 8 NCERT Class 9 Science SOLUTIONS

Question:

Answer:

More NCERT Questions

An object of mass 100 kg is accelerated uniformly from a velocity of 5 ms–1 to 8 ms–1 in 6 s. Calculate the initial and final momentum of the object. Also find, the magnitude of the force exerted on the object.

An object of mass 100 kg is accelerated uniformly from a velocity of 5 ms–1 to 8 ms–1 in 6 s. Calculate the initial and final momentum of the object. Also find, the magnitude of the force exerted on the object.

A hockey ball of mass 200 g travelling at 10 ms–1. It struck by a hockey stick so as to return. It along it's original path with a velocity at 5 ms–1. Calculate the change of momentum occurred in the motion of the hockey ball by the force applied by the hockey stick.

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Explain why some of the leaves may get detached from a tree if we vigorously shake its branch.

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