A ping pong player serves a ball to her opponent. The net force on the ball over time is shown below. How does the balls velocity change between 30 and 60ms?

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?

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1