A car is travelling to the right with a speed of 42 m/s when the driver slams on the brakes. The car skids for 4.0 s with constant acceleration before it comes to a stop.
What is the displacement of the car as it skids to a stop?

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

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.

2) why do satelites not fall while revolving around the earth?