AP PHYSICS 1 Test Booklet Unit 3 Progress Check: FRQ 1 1. Show all your work for each part of the the question. The parts within the question may not have equal weight. mah- 1/2mv +mghf mgh = 1/ mv - +mg zr Point P h Figure 1 Note: Figure not drawn to scale. A curved track leads into a circular loop of radius R, as shown in Figure 1. A block of mass m is released from rest from a height h on the track. The block slides down the track and around the loop without losing contact with the track. All frictional forces are negligible. vg + * = ug + Kp (a) EY = EF 1/ 2m vg . = ugtk VFN hetym = V h - 26 Que = :4/2 my 2 yam 20 ng hip = height of p = V Figure 2 201 1 2m i. The dot in Figure 2 represents the block when the block is at Point P. Draw and label arrows that represent the forces (not components) that are exerted on the block. Each force must be represented by a distinct arrow starting on, and pointing away from, the dot. Forces that are exerted in the same direction should be drawn side by side. ii. Starting with conservation of energy, derive an expression for the speed of the block at Point P. iii. Derive an expression for the force exerted by the track on the block as the block passes through Point P, as