A 1000 kg car with a speed of 90 km/h brakes to a stop. How many calories of heat are generated by the brakes as a result?
Here we apply total energy conservation. Here kinetic energy of car is converted into heat.

A 1000kg car with a velocity of 25m/s brakes to a stop. how many calories of heat are generated by the brakes as a result?
A bicycle and rider have a combined mass of 114.0 kg. How many calories of heat are generated in the brakes when the bicycle comes to a stop from a speed of 32.2 km/h? kcal
How much work must be done to stop a 1200-kg car traveling at 90 km/h ? Express your answer to two significant figures and include the appropriate units.
How much work must be done to stop a 1150-kg car traveling at 90 km/h ? Express your answer to two significant figures and include the appropriate units.
A 700 -kg car is traveling with speed of 90 km/h when the driver sees a bear and slams on the brake. The car comes to stop in 6 seconds. What is the kinetic coefficient of friction between the car's tires and the surface of the road?
How many kilocalories are generated when the brakes are used to bring a 1100-kg car to rest from a speed of 85km/h ? 1 kcal = 4186 J
A 2500 kg car is traveling 25 m/s and brakes to a stop. This causes the brakes to heat up as the car’s kinetic energy is converted to thermal energy. If the heat in the brakes could be captured and applied to ice at 0 degrees Celsius, how much could it melt?
How much heat (Wh = 3600 J) is generated at the brakes in stopping a 1000 kg electric vehicle moving at 100 km/hour? (Assume all of the kinetic energy is converted into heat.)
You are driving a car with speed of 100 miles per hour, you applied the brakes to avoid hitting a deer. How many calories of heat are produced in the stopping process if the car mass is 1000kg?
How much work must be done to stop a 1200-kg car traveling at 145 km/h ?