A hockey ball of mass 200 g travelling at $10 m s^{- 1}$ is struck by a hockey stick so as to return it along its original path with a velocity of $5 m s^{- 1}$ . Calculate the change of momentum which occurred in the motion of the hockey ball by the force applied by the hockey stick:

- 3 N s

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3 N s

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6 N s

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- 6 N s

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Solution

The correct option is A $- 3 N s$
Mass of ball(m) $=$ 200g $=$ 0.2kg
Initial velocity of ball(u) $=$ 10m $s^{- 1}$
Final velocity of ball(v) $=$ 5m $s^{- 1}$
Therefore, change in momentum ( $△$ p) $=$ Final momentum - initial momentum $= m (v - u) = 0.2 \times (- 5 - 10) = - 3 k g m s^{- 1} = - 3 N s$

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Q. Question 13
A hockey ball of mass 200 g travelling at

10 m s^{- 1}

is struck by a hockey stick so as to return it along its original path with a velocity at

5 m s^{- 1}

. Calculate the change of momentum occurred in the motion of the hockey ball by the force applied by the hockey stick.

A hockey ball of mass 200 gram travelling at 10 m/s is struck by a hockey stick so as to return it along with original path with a velocity at 5 m/s . Calculate the change of momentum Orchid in the motion of the hockey Ball by the force applied by the hockey stick.

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Q. A hockey ball of mass

50 g

travelling at

20 m / s

is struck by a hockey stick. So as to return it along its original path with a velocity at

20 m / s

. Its change in momentum occured in the motion of the hockey ball by the force applied by the hockey stick:

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

The correct option is A −3 NsMass of ball(m)=200g=0.2kgInitial velocity of ball(u)=10ms−1Final velocity of ball(v)=5ms−1Therefore, change in momentum (△p) = Final momentum - initial momentum =m(v−u)=0.2×(−5−10)=−3 kgms−1=−3 Ns

A hockey ball of mass 200 g travelling at $10 m s^{- 1}$ is struck by a hockey stick so as to return it along its original path with a velocity of $5 m s^{- 1}$ . Calculate the change of momentum which occurred in the motion of the hockey ball by the force applied by the hockey stick: