The sophomore students at the University of California in Los Angles are performingan experiment in Work-Energy Principle and Conservation of Mechanical Energy. Aspring whose scale is 12 N/mm is compressed by 150 mm using a 1000N block. If theblock is released, compute the total distance the block will slide. Assuming that thecoefficient of friction is .

A small block slides with velocity 0.5√gr on the horizontal frictionless surface as shown in the Figure. The block leaves the surface at point C. The angle θ in the Figure is:

a force of magnitude F = 12.0 Napplied to an 8.00 kg block at a downward angle ofθ = 30.0°. The coefficient of static friction between blockand floor is 𝜇s = 0.700; the coefficient of kinetic friction is𝜇k = 0.400. Does the block begin to slide or does it remainstationary? What is the magnitude of the frictional forceon the block?

A block of mass 2.30 kg slides down a slope at an angle of 33° to the horizontal, with a constant velocity of 1.0 m s–1. Calculate the coefficient of dynamic friction between the slope and the block and express your answer to two significant figures.

A 6.9-kg block is held in place against the spring by a 69-N horizontal external force. The external force is removed, and the block is projected with a velocity v1 = 2.2 m/s upon separation from the spring. The block descends a ramp and has a velocity v2 = 3.5 m/s at the bottom.The track is frictionless between points A and B. The block enters a rough section at B, extending to E.  The coefficient of kinetic friction is 0.39. The velocity of the block is v3 = 1.8 m/s at C. The block moves on to D, where it stops.What is the spring constant of the spring?Express your answer in N/m, to at least one digit after the decimal point.

. In addition to the final velocity of the block, which of the following information would students need to test the hypothesis that the work done by the net force on the block is equal to the change in kinetic energy of the block as the block moves from