1. A block is placed on a plane whose angle of inclination is 30˚. The coefficients of static and kinetic friction for the block on the inclined plane are both 0.2. The block (A) remains stationary on the inclined plane. (B) accelerates down the inclined plane. (C) travels down the inclined plane at a constant velocity. (D) travels up the inclined plane at a constant velocity. (E) accelerates up the inclined plane.
2. An object with a mass of 5.5 kg is allowed to slide from rest down an inclined plane. The plane makes an angle of 30˚ with the horizontal and is 72 m long. The coefficient of friction between the plane and the object is 0.35. The speed of the object at the bottom of the plane is?
3. A 5-kg object slides down a frictionless surface inclined at an angle of 30˚ from the horizontal. The total distance moved by the object along the plane is 10 meters. The work done on the object by the normal force of the surface is?
4. A mass m = 2.5 kg is sliding along a frictionless table with initial speed v as shown in the figure. It strikes a coiled spring that has a force constant k = 500 N/m and compresses it a distance x=5.0 cm. The initial speed v of the block was..?
5. The graph shows how the position of a particle depends on time. Which choice is closest to the instantaneous speed of the particle at t = 3s? (A) 0.40 m/s (B) 0.67 m/s (C) 0.75 m/s (D) 1.50 m/s (E) 2.22 m/s
6. Calculate the work done by a force, F = 2x i, along the path (0, 0) -> P1(2, 0) -> P2(2, 2).
