Calculate the kinetic energy of 1,400 kg roller

coaster car that is moving with a speed of 12

m/s when it reaches the bottom of the hill.

A car traveling at speed v takes distance d to stop after the brakes are applied. What is the stopping distance if the car is initially traveling at speed 7.0v? Assume that the acceleration due to the braking is the same in both cases.

The equation for distance is d = st. If a car has a speed of 35 m/s, how long will it take to go 100 m? A. 2.9 s B. 3500 s C. 65 s D. 5.9 s

Which of the following weathering processes involves the constant freezing and thawing of water? Question 1 options: unloading spheroidal weathering frost wedging exfoliation

Which action will cause the magnetic force to push two magnets closer together? Select one of the options below as your answer: A. aligning the north poles of two magnets B. aligning the south poles of two magnets C.

When in orbit, astronauts experience weightlessness. What is this caused by? The astronauts have no mass in space. Gravitational forces do not occur in space. The astronauts experience no contact (normal) forces with their surroundings.

According to the concept of length contraction, what happens to the length of an object as it approaches the speed of light and then slows down, eventually coming to a stop? It is always observed as contracting.

If you could chooses between to nearly identical products the one that is free and the other you have to pay for which would you choose why

A bicyclist bikes the 56 mi to a city averaging a certain speed. The return trip is made at a speed that is 6 mph slower. Total time for the round trip is 11 hr. Find the bicyclist's average speed on each part of the trip.

You have two pendulums with cords that are exactly the same length. one is on earth (with an acceleration due to gravity of 9.81 meters/second2) and the other one is on the moon (with an acceleration due to gravity of 1.63 meters/second2).

A light-rail train going from one station to the next on a straight section of track accelerates from rest at 1.1 m/s2 for 20 s. It then proceeds at constant speed for 1100 m before slowing down at 2.2 m/s2 until it stops at the station.