A box weighing 8 kg rests on a horizontal table. If the coefficient of static friction is 0.75, then the minimum force required to set the block
into motion is

May someone explain how to do this question?

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.

The two required components for a generator