Answer to Question #278539 in Physics for hanns

Question

1. calculate the momentum of a 0.15 kg ball that is moving northwards towards home plate at a velocity of 40 m/s.
2. a 100 kg car strikes a tree at 30.0 km/h and comes to a stop in 0.15 s. Determine the following:

  a. What is the car's initial momentum?

b. What is the average force on the car while the car is being stopped?

1. A 50 kg mass is sitting on a frictionless surface. an unknown constant force pushes the mass for 2 second until that mass reaches a velocity of 3 m/s.

a. what is the initial momentum of the mass?

b. what is the final momentum of the mass?

c. what was the force acting on the mass?

d. what was the impulse acting on the mass?

Answer 1

1. $p=mv=6\text{ kg}·\text{m/s N}.$

2. a. $p=mv=833\text{ kg}·\text{m/s}.$

b. $F=p/t=5553\text{ N}.$

1. a. The initial is 0.

b. The final is 50·3=150 kg·m/s

c. The force is 150/3=50 N.

d. The impulse is 150 kg·m/s