A10.0 kg mass is at the origin. a 20.0 kg mass 0.500 m to the left of it, and a 30.0 kg mass is 1.25 m to the right of it. what is the net gravitional force on the 10.0 kg mass

A2 kg ball travellng to the right with a speed of 4 m/s collidees with a 5 kg ball traveling to the left with a speed of 3 m/s. take right to be the positive direction. what is the total momentum of the two balls before they collide? what is the total momentum of the two balls after they collide?

It is really hard for me right know

To a of 4 x hz is 1. 0. mm nm nm