E3. A block of mass 1.00 kg sits on an inclined plane as shown.(Figure 1)A force of magnitude 50.0 N is pulling the block up theincline. The coefficient of kinetic friction between the plane andthe block is 0.500. The inclined plane makes an angle 10.0 degreeswith the horizontal.
What is the total work Wfric done on the block by the force offriction as the block moves a distance 6.00 mm down theincline?
E12. On a frictionless horizontal air table, puck A (with mass0.254 kg ) is moving toward puck B (with mass 0.366 kg), which isinitially at rest. After the collision, puck A has velocity 0.119m/s to the left, and puck B has velocity 0.654 m/s to theright.
a. What was the speed vi of puck A before the collision?
b. Calculate ΔK, the change in the total kinetic energy of thesystem that occurs during the collision.
Express all your answer numerically, in Joules.
