Block VO -Ramp A student strikes a block at the bottom of a ramp, giving it an initial speed vo up the ramp, as shown at right. There is friction between the ramp and the block as it slides a distance xup the ramp and then slides back down. (a) On the dots below, which represent the block as it is sliding up the ramp and down the ramp, draw and label the forces (not components) exerted on the block. Represent each force by a distinct arrow starting on, and pointing away from, the dot. The dashed lines are drawn at the same angle as the surface of the ramp. Up the Ramp Down the Ramp(b) The block takes time tup to slide up the ramp a distance x. The block then takes time tdown to slide back down to the bottom of the ramp, where it has speed Uf. Is tdown greater than, equal to, or less tup? - tdown > tup -tdown = tup - tdown