An 80 kg rollercoaster car traveling 10 m/s passes over the crest of a 40 m high hill as shown in the figure. the speed of the car at the bottom of the hill is 24 m/s. the mechanical energy lost to friction is most nearly?

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?

Which of the following will cause an induced current in a coil of wire? the constant field of the earth passing through the coil a magnet resting near the coil a magnet being moved into or out of the coil a wire carrying a constant current near the coil

Due in 40 explain in terms of frame of reference if you’re inside a moving train everything on the outside can seem to be moving