Amy has a mass of of 50 kg, and she is riding a skateboard traveling 10 m/s . what is her momentum?
a) 50 kg*m/s
b) 500 kg*m/s
c) 5 kg*m/s
d) 10 kg*m/s
(there is 4 other questions if someone can ? )

The momentum of an isolated system is conserved a) only in inelastic collisions. b) only in elastic collisions. c) in both elastic and inelastic collisions

Gasoline comes from petroleum, which is made from ancient living things. petroleum, therefore, contains a type of energy. a. heat b. nuclear c. biological d. chemical potential

The rocket is fired vertically and tracked by the radar station shown. when θ reaches 66°, other corresponding measurements give the values r = 32700 ft, r¨ = 85 ft/sec2, and θ˙ = 0.019 rad/sec. calculate the magnitudes of the velocity and acceleration of the rocket at this position.