Physicsdummy1
- 5
- 0
2. A car of mass m traveling down the motorway at 100 km/hr suddenly stops pressing the accelerator pedal. The result is that the car slows to 60 km/hr in ten seconds. Suppose all travel is along a level road.
(a) What is the average force acting on the car serving to slow it's motion?
(b) How much power is required to maintain the car at 100 km/hr given this external force?
(c) How much more energy is done in traveling at 105 km/hr than 100 km/hr? To how much petrol might this correspond?
(a) What is the average force acting on the car serving to slow it's motion?
(b) How much power is required to maintain the car at 100 km/hr given this external force?
(c) How much more energy is done in traveling at 105 km/hr than 100 km/hr? To how much petrol might this correspond?