pg. 193 (1-6) Physics 11

Jenny has a mass of 35.6 kg and her skateboard has a mass of 1.3 kg. What is the momentum of Jenny and her skateboard together if they are going 9.50 m/s?

346.74 kg m/s

A hockey player makes a slap shot, exerting a force of 30 N on the puck for 0.16 s. What is the impulse given to the puck?

4.8 N s

The hockey puck shot it Problem 2 has a mass of 0.115 kg and was at rest before the shot. With what speed does it head toward the goal?

41.74 m/s

A force of 6 N acts on a 3 kg object for 10 s.

a) What is the object’s change in momentum

b) What is it’s change in velocity?

a) 60 kg m/s

b) +20 m/s

The velocity of a 600 kg auto is changed from 10 m/s to 44 m/s in 68 s by an applied, constant force.

a) What is the change in momentum?

b) What is the magnitude of the force?

a) 20400 kg m/s

b) +300 N

A 845 kg drag race car accelerates from rest to 100 km/h in 90 s.

a) What is the change in momentum of the car?

b) What average force is exerted on the car?

a) 23472.2 kg m/s

b) 26080.25 N