A 239.46 kg crate slides 5.46 m until coming to a stop after being pushed by a large man. The effective coefficient of kinetic friction between the crate and the surface is
0.35. Calculate the work done by friction.

Which of the following represents a virtual image?

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.

If two students are running down the hall toward each other, trying to get to class, and they have the same mass and acceleration, what will happen when they collide? will their forces cancel out or will each one experience a reaction?