Abobsled starts at rest then races down a 200m track with a constant acceleration. the bobsled starts 40 m off the ground then races down the track 200m to the ground. the mass of the bobsled is 50kg. when the bobsled reaches the end of the track it is moving at 19 m/s. g=10 m/\^2

If the temperature were raised very high, classically what would we expect the heat capacity per object to be for this one-dimensional system? give a numerical value. chigh t = __ j/k/object (one reason for the discrepancy is that the high-temperature limit assumes that the number of oscillators is large (n > > 1), which is not the case in this tiny system.)

Erosion of the beach is normally a slow process. however, in certain situations, large chunks of shore may wash out to sea. what could cause this to happen?

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration