1. Exam II Review

2. Chap 4-Problem 48
(II) The block shown in Fig. 4–43 has mass m=7.0kg and lies on a fixed smooth frictionless plane tilted at an angle θ= 22° to the horizontal. (a) Determine the acceleration of the block as it slides down the plane. (b) If the block starts from rest 12.0 m up the plane from its base, what will be the block’s speed when it reaches the bottom of the incline?

3. Chap 6- Pb. 25
25. (II) You know your mass is 65 kg, but when you stand on a bathroom scale in an elevator, it says your mass is 76 kg. What is the acceleration of the elevator, and in which direction?

4. Chap 5- Problem 18
18. (II) The crate shown in Fig. 5–33 lies on a plane tilted at an angle θ=25° to the horizontal, with μk =0.19. (a) Determine the acceleration of the crate as it slides down the plane. (b) If the crate starts from rest 8.15 m up the plane from its base, what will be the crate’s speed when it reaches the bottom of the incline?

5. Chap 5- Problem 51
51. (II) A coin is placed 12.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 35.0 rpm (revolutions per minute) is reached, at which point the coin slides off. What is the coefficient of static friction between the coin and the turntable?

6. Chap 6- Pb. 23
23.(I) The space shuttle releases a satellite into a circular orbit 680 km above the Earth. How fast must the shuttle be moving (relative to Earth’s center) when the release occurs?