Posted by **Isis** on Sunday, February 24, 2013 at 7:59pm.

1.)A 0.5 kg hockey puck moving at 35 m/s hits a straw bale, stopping in 1 s.

a) What impulse is delivered to the ball?

b) What force is exerted on the puck?

2.) A racing car with a mass of 1400 kg hits a slick spot and crashes head-on into a concrete wall at 50 m/s, coming to a halt in 0.8 s.

a) What is the change in momentum?

b) What is the impulse

c)What force is exerted on the car?

3.) An ambulance weighing 3000 kg comes racing to the rescue, hits the same slick spot, and then collides with a padded part of the wall at 50 m/s, coming to a halt in 2 s.

a) What is the change in momentum?

b) What is the impulse

c)What force is exerted on the ambulance?

d) How this answer differ from the problem above??

>>FORMULA'S<<

P=w/t

P= energy/time

P=mad/t

P= Fd/t

:)

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