Thursday
April 28, 2016

# Homework Help: Physics -Impulse- part 2

Posted by Isis on Sunday, February 24, 2013 at 7:48pm.

1) A 0.50 kg object is at rest. A 3.00 N force to the right acts on the object during a time interval of 1.50 s
a) What is the impulse?
b) What is the velocity of the object at the end of this time interval?

2) A 2250 kg car traveling to the west at 20.0 m/s slows down uniformly and comes to a stop.
a) What is the impulse delivered to the car?
b) How long it would take the car to come to a stop if the force on the car is 8450 N to the east?

3) A 2.5 kg ball strikes a wall with a velocity of 7.5 m/s to the right. The ball is in contact with a wall for 0.25 s.
a)What is the change in momentum?
b) What is the impulse delivered?
c) What is the constant force exerted on the ball by the wall?

4) A 0.15 kg baseball moving at +26 m/s is slowed to a stop by a catcher who exerts a constant force of -390 N.
a) What is the change in momentum?
b) What is the impulse delivered?
c) how long does it take this force to stop?

.need help!! :)

>>formula's<<
P=w/t
P=energy/time