3. It is late and Carlos is sliding down a rope from his third floor window to m

Question

3. It is late and Carlos is sliding down a rope from his third floor window to meet his friend Juan. As he slides down the rope faster and faster, he becomes frightened and grabs harder on the rope, increasing the tension in the rope. As soon as the upward tension in the rope becomes equal to his weight: A. Carlos will slow down. B. Carlos will continue down at a constant velocity. C. Carlos will stop. D. the rope must break. -4. A 4.0-kg bowling ball experiences a net force of 9.0 N. what will be its acceleration? A. 9.0 m/s B. 36 m/s2 c. 2.25 m/s2 D. 4.0 m/s2 E. 0.44 m/s2 Page 1

Explanation / Answer

3) By the time the Tension equals his weight, Carlos is already accelerated some time and gained some velocity. so when tension equals weight, there is no acceleration anymore. So

B) Carlos will continue at a constant velocity.

4) Force F = 9 N, mass of ball m = 4 Kg, So from F = ma, accleration a = F/m = 9/4 = 2.25. So the answer is

C) a = 2.25 m/sec2.

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