Jessie is moving into a new apartment. She pushes her 50 kg couch into her living room. It accelerates at 2 m/s^2. What is the net force on the couch? *

Which two objects have the greatest gravitational force acting between them

The image shows the positions of a car on a roller coaster track. arrange the cars in order based on their gravitational potential energy. begin with the lowest potential energy and end with the highest.

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f