Q: A block is placed against the vertical front of a cart (
A block is placed against the vertical front of a cart (Fig. P5.95). What acceleration must the cart have so that block A does not fall? The coefficient of static friction between the block and the ca...
See AnswerQ: Two blocks, with masses 4.00 kg and 8.
Two blocks, with masses 4.00 kg and 8.00 kg, are connected by a string and slide down a 30.0° inclined plane (Fig. P5.96). The coefficient of kinetic friction between the 4.00-kg block and...
See AnswerQ: Block A, with weight 3w, slides down an inclined plane
Block A, with weight 3w, slides down an inclined plane S of slope angle 36.9° at a constant speed while plank B, with weight w, rests on top of A. The plank is attached by a cord to the wal...
See AnswerQ: Jack sits in the chair of a Ferris wheel that is rotating
Jack sits in the chair of a Ferris wheel that is rotating at a constant 0.100 rev/s. As Jack passes through the highest point of his circular path, the upward force that the chair exerts on him is equ...
See AnswerQ: A curve with a 120-m radius on a level road
A curve with a 120-m radius on a level road is banked at the correct angle for a speed of 20 m/s. If an automobile rounds this curve at 30 m/s, what is the minimum coefficient of static friction neede...
See AnswerQ: Consider a wet roadway banked as in Example 5.22 (
Consider a wet roadway banked as in Example 5.22 (Section 5.4), where there is a coefficient of static friction of 0.30 and a coefficient of kinetic friction of 0.25 between the tires and the roadway....
See AnswerQ: Blocks A, B, and C are placed as in Fig
Blocks A, B, and C are placed as in Fig. P5.101 and connected by ropes of negligible mass. Both A and B weigh 25.0 N each, and the coefficient of kinetic friction between each block and the surface is...
See AnswerQ: You are riding in a school bus. As the bus rounds
You are riding in a school bus. As the bus rounds a flat curve at constant speed, a lunch box with mass 0.500 kg, suspended from the ceiling of the bus by a string 1.80 m long, is found to hang at res...
See AnswerQ: You throw a rock downward into water with a speed of 3mg
You throw a rock downward into water with a speed of 3mg/k, where k is the coefficient in Eq. (5.5). Assume that the relationship between fluid resistance and speed is as given in Eq. (5.5), and calcu...
See Answer
