Momentum questions

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?

p=350.55kg m/s

A hockey player makes a slap shot, exerting a force of 30.0 N on the hockey puck for 0.16 s. What impulse is given to the puck?

4.80 kg·m/s

A force of 6.00 N acts on a 3.00 kg object for 10.0 s. What is the objects change in momentum? What is its change in velocity?

-The object's change in momentum is 60.0 kg·m/s

-The object's change in velocity is 20.0 m/s

The velocity of a 600 kg auto is changed from +10.0 m/s to +44.0 m/s in 68.0 s by an applied, constant force. What change in momentum does the force produce? What is the magnitude of the force?

-The change in momentum is 20,400 kg·m/s

-The magnitude of the force is 300 N

A 845 kg drag race car accelerates from rest to 100 km/h in 0.90s. What is the change in momentum of the car? What average force is exerted on the car?

-The change in momentum of the car is 23.4 kg·m/s.

-The average force exerted on the car is 26.0 N.

A 95 kg fullback, running at 8.2 m/s, collides in midair with a 128 kg defensive tackle moving in the opposite direction. Both players end up with zero speed. What was the fullback’s momentum before the collision? What was the change in the fullbacks momentum? What was the change in the tackles momentum? What was the tackle’s original momentum? How fast was the tackle moving originally?

-The fullback's momentum before the collision is 779 kg·m/s.

-The change in the fullback's momentum is -779 kg·m/s.

-The change in the tackle's momentum is +779 kg·m/s.

-The tackle's original momentum is 779 kg·m/s.

-The tackle was moving at 4.8 m/s originally.

Before collision, a 25 kg object is moving at +12 m/s. Find the impulse that acted on this object if, after the collision, it moves at a) +8 m/s and b) -8 m/s

-The impulse acting on the object when it moves to +8 m/s is -100 kg·m/s.

-The impulse acting on the object when it moves to -8 m/s is -250 kg·m/s.

A 2575 kg van runs into the back of an 825 kg compact car at rest. They move off together at 8.5 m/s. Assuming no friction with the ground, find the initial speed of the van.

The initial speed of the van is 12.5 m/s.

A 15 g bullet is shot into a 5085 g wodden block standing on a frictionless surface. The block, with a bullet in it, acquires a velocity of 1.0 m/s. Calculate the velocity of the bullet before striking the block.

The bullet's velocity before striking the block is 75 m/s.

A hockey puck, mass 0.115 kg, moving at 35.0 m/s, strikes an octopus thrown on the ice by a fan. The octopus has a mass of 0.265 kg. The puck and octopus slide off together. Find their velocity.

The combined velocity of the puck and octopus after the collision is 25.3 m/s.

A car with mass 1245 kg, moving at 29 m/s strikes a 2175 kg car at rest. If the two cars stick together, with what speed do they move?

The combined speed of the two cars after the collision is 20.4 m/s.