1. A 20.0 N force directed 20.0° above the horizontal is applied to a 6.00 kg crate that is traveling on a horizontal surface. What is the magnitude of the normal force exerted by the surface on the crate?

N = 52.0 N

Explanation:

Given:

The net force is given by

Solving for N, we get

i guess it’s a and b

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.