p2 3 work energy and momentum relationship
{"Image DocumentName": "P2 3.2 Kinetic energy", "Image ImageDescription": "What are kinetic energy and elastic potential energy? How does the kinetic energy of an object depend on its speed? How can we calculate kinetic energy? Kinetic energy (J) = \u00bd x mass (kg) x speed2 (m/s)2. Elastic potential energy is the energy stored in an elastic object when work is done on it to change its shape. Question: A car moving at constant speed has J of kinetic energy. When the driver applies the brakes, the car stops in a distance of 95m. a) Calculate the force that stops the vehicle. b) The speed of the car was 30m/s when its kinetic energy was J. Calculate its mass.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}