A roller coaster weighing 2000 kg is lifted to a height of 28 m within 30 seconds with a kind of elevator. Calculate how many kilowatts of power the elevator has to deliver.

Aperson standing in a canoe exerts a force of 700 n to throw an anchor over the side. find the acceleration of the canoe if the total mass of the canoe and the person is 100 kg?

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?

To practice problem-solving strategy 10.1 for energy conservation problems. a sled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slides a distance d1 down the slope and then covers the distance d2 along the horizontal terrain before stopping. find the coefficient of kinetic friction μk between the sled and the ground, assuming that it is constant throughout the trip.