A 15000 kg car accelerate from 15 to 13 m/s in 5.0
second. How much work is done by the car?
A 65 kg student dives off a 4.0 m board into a swimming pool.
a) what is the kinetic energy of the student upon entering the water?
b) what is the speed of the student upon entering the water?
A 15000 kg car accelerate from 15 to 13 m/s in 5.0 second. How much work...
How much work (in J) is done to accelerate a car which has a mass of 3700 kg from a speed of 17 m/s to a speed of 30 m/s?
13. Suppose a car of mass 100 kg is moving with a speed of 20 m/s. How much KE does it carry? If a truck of mass 2000 kg is moving with a same speed what is it Kinetic energy?
17) A 7700 kg boxcar traveling at 14.0 m/s strikes a second car at rest. The two stick together and move off with a speed of 5.0 m/s. What is the mass of the second car? A) 14000 kg B) 13000 kg C) 13860 kg D) 13720 kg E) 12970 kg
3 A 1350-kg car is to accelerate from rest to a speed of 30.0 m/s in a time of 12.0 s as it climbs a 15° hill. Assuming uniform acceleration, what minimum power is needed to accelerate the car in this way? (Answer in kW)
The driver of a 840.0 kg car decides to double the speed from 22.4 m/s to 44.8 m/s. What effect would this have on the amount of work required to stop the car, that is, on the kinetic energy of the car? KEi= ×105 J KEf= ×105 J (select)3,4,8 or 2 times as much work must be done to stop the car.
A 9300 kg boxcar traveling at 15.0 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 6.0 m/s. What is the mass of the second car? Calculate the amount of kinetic energy lost as thermal energy during the collision.
A 0.42-kg particle has a speed of 5.0 m/s at point A and kinetic energy of 8.5 J at point B. (a) What is its kinetic energy at A? J (b) What is its speed at point B? m/s (c) What is the total work done on the particle as it moves from A to B? J
1. How much work W must be done on a particle with a mass of m to accelerate it from rest to a speed of 0.895c?(in units of mc^2)2. How much work W must be done on a particle with a mass of m to accelerate it from a speed of 0.895c to a speed of 0.990c?
A 4 kg toy car with a speed of 15 m/s collides head-on with a stationary 1 kg car. After the collision, the cars are locked together with a speed of 12.0 m/s. How much kinetic energy is lost in the collision?
A 1500 kg car begins Wing down a 5.0 inclined road with a speed of 30 km/h. The engine is turned off. After the car has traveled 50 m along the road, its speed is 40 km/h (a) How much is the mechanical energy of the car reduced because of the net frictional force? (b) What is the magnitude of that net frictional force?