College Physics A Strategic Approach 2nd Edition Randall D. Knight, Brian Jones, Stuart Field - Solutions

For Questions 16 through 19, determine the tension in the rope at the point indicated with a dot.• All objects are at rest. • The strings and pulleys are massless, and the pulleys are frictionless. 5 kg 5 kg FIGURE Q5.17
An astronaut's weight on earth is 800 N. What is his weight on Mars, where g = 3.76 m/s2?
The floor is frictionless. In which direction is the kinetic friction force on block 1 in Figure Q5.20? On block 2? Explain. Pulley 1 2
A woman has a mass of 55.0 kg. a. What is her weight on earth? b. What are her mass and her weight on the moon, where g = 1.62 m/s2?
The wood block in Figure Q5.21 is at rest on a wood ramp. In which direction is the static friction force on block 1? .A. Up the slope. B. Down the slope. C. The friction force is zero.D. There's not enough information to tell. 1 FIGURE Q5.21 2
A 2.0 kg ball is suspended by two light strings as shown in Figure Q5.22. What is the tension T in the angled string? A. 9.5 N B. 15 N C. 20 ND. 26 NE. 30 N FIGURE Q5.22 50° m = 2.0 kg
a. A 0.60 kg bullfrog is sitting at rest on a level log. How large is the normal force of the log on the bullfrog? b. A second 0.60 kg bullfrog is on a log tilted 30 above horizontal. How large is the normal force of the log on this bullfrog?
While standing in a low tunnel, you raise your arms and push against the ceiling with a force of 100 N. Your mass is 70 kg. a. What force does the ceiling exert on you? A. 10 N B. 100 N C. 690 N D. 790 N E. 980 Nb. What force does the floor exert on you? A. 10 N B. 100 N C. 690 ND. 790
A 5.0 kg dog sits on the floor of an elevator that is accelerating downward at 1.20 m/s2. a. What is the magnitude of the normal force of the elevator floor on the dog? A. 34 N B. 43 N C. 49 ND. 55 N E. 74 Nb. What is the magnitude of the force of the dog on the elevator floor? A. 4.2 N B.
A 3.0 kg puck slides due east on a horizontal frictionless surface at a constant speed of 4.5 m/s. Then a force of magnitude 6.0 N, directed due north, is applied for 1.5 s. Afterward, a. What is the northward component of the puck's velocity? A. 0.50 m/s B. 2.0 m/s C. 3.0 m/s D. 4.0 m/s E.
A rocket in space, initially at rest, fires its main engines at a constant thrust. As it burns fuel, the mass of the rocket decreases. Which of the graphs in Figure Q5.26 best represents the velocity of the rocket as a function of time? E A. FIGURE Q5.26 B. - C, D.

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