A racetrack in Fontana has a radius of 225 m, and is banked atan angle of 40◦with respect to the ground. The coefficient ofstatic friction between the track and a typical set of tires is 0.65.Find the minimum speed that a car can travel so that the carwill not slip down the incline.

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.

In which of the following is positive work done by a person on a suitcase