Question

A hockey ball of mass .2 Kg travelling at 10 ms-1 is struck by a hockey stick so as to return it along its original path with a velocity at 2 m/s . Calculate the change of momentum occurred in the motion of the hockey ball by the force applied by the hockey stick.

Answer 1

Answer:

Mass of ball, m = 200 g = 0.2 kg      

Initial speed of ball, u = 10 m/s      

Final speed of ball, v = – 5 m/s

To Find:-

Change in momentum

Solution:-

Initial momentum = Mass × Initial speed

⇒            

⇒

Final momentum = Mass × Final Speed

⇒

⇒

Then,

Change of Momentum = Final momentum - Initial momentum

⇒ 2 – (–1)

⇒ 2 + 1

= - 3 kg m/s

Hence, the change in momentum of the hockey ball is 3 kg m/s

Here, Minus sign means the balls starting moving in opposite direction.

Explanation:-

Momentum  is the product of the mass and the velocity of an object or particle. It is a vector quantity. It is the property that a moving object has due to its mass and its motion.

Answer 2

Explanation:

see the upper answer mark as branlist