A car accelerates from rest at a rate of 3 m/s² for 4 seconds. How far did the car travel? PLEASE HELP fast

An object has a weight of 500 on earth what is the mass of this object

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.