Exam II Review

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?

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?

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?

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?

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?