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Impulse Sample Assignment

Question: A football of mass 0.45 kg travels in a straight line along the ground reaching a player at 10m/s. The player passes it on at 8m/s altering its direction by 90°. Find the impulse given to the ball by the player.

Ans: Choose the co-ordinate system like that in Figure 4.1

Initial velocity in the direction Ox is 10 m/s. Final velocity in the direction Ox is zero. So change in velocity in the direction Ox is -10m/s.

Initial velocity in the direction Oy ia zero and final velocity in the direction Oy is 8m/s. So change in velocity in the direction Oy is 8m/s.

The resultant change in velocity is

impulse is change in momentum is mass times change in velocity

Other Sample Assignments in Physics Homework Assignment :

Work Energy Power	Minimum Pulling Force
Shear Stress	Loss in Kinetic Energy
Impulse

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