IMPULSE AND IMPULSIVE FORCE

Impulse is ?

• The change in momentum

• The rate of force acting

• The rate of change in momentum

• The change in inertia

Impulsive force is ?

• The change in velocity

• The change in acceleration

• The rate of change in momentum

• The rate of change in inertia

The symbol and unit for impulse are

• J and N/s

• F and N

• J and N s

• W and N s

A boy kick a stationary ball of mass 0.15 kg. The ball moves forward at a velocity of 60 ms^-1 and the time of impact between the boy’s foot and the ball is 5 ms. What is the impulsive force?

• 1.8 N

• 180 N

• 9 N

• 1800 N

Find the impulse exerted on a 0.2 kg ball when it is hit with velocity 20 m/s and rebounds with velocity 40 m/s after 0.01s .

• -12 N

• -12 N s

• 12 N s

• 12 N