What is the type of friction force if the object appears just about to start motion? Why?

Asystem containing an ideal gas at a constant pressure of 1.22×10^5 pa gains 2140 j of heat. during the process, the internal energy of the system increases by 2320 j. what is the change in volume of the gas?

Explain how the energy of rubber ball is tranforned as it roll down a ramp. give evidence that the energy of the og the ball remains the same at all points on the ramp

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?