11. Momentum & Impulse

You throw a 100-g ball with 30m/s. If the ball is in your hand for 0.2s during the throw, a) calculate the impulse

you deliver to it. b) Calculate the average Force that you exert on the ball.

You catch a 0.6 kg ball initially moving with 10 m/s. Calculate the impulse delivered to the ball during the catch.

(II) A 95-kg fullback is running at 3.0 m/s to the east and is stopped in 0.75 s by a head-on tackle by a tackler running due west. Calculate

(c) the impulse exerted on the tackler.

(II) A 95-kg fullback is running at 3.0 m/s to the east and is stopped in 0.75 s by a head-on tackle by a tackler running due west. Calculate

(d) the average force exerted on the tackler.

(III) Air in a 120-km/h wind strikes head-on the face of a building 45 m wide by 75 m high and is brought to rest. If air has a mass of 1.3 kg per cubic meter, determine the average force of the wind on the building.

(II) A 95-kg fullback is running at 3.0 m/s to the east and is stopped in 0.75 s by a head-on tackle by a tackler running due west. Calculate

(b) the impulse exerted on the fullback,