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Chapter 7: Q. 17 (page 177)
What is the tension in the rope of FIGURE EX7.17?
The tension in the rope
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A long, rope hangs from a support that breaks, causing the rope to fall, if the pull exceeds . A student team has built a robot “mouse” that runs up and down the rope. What maximum acceleration can the robot have—both magnitude and direction—without the rope falling?
shows ahamster sitting on an wedge-shaped block. The block, in turn, rests on a spring scale. An extra-fine lubricating oil having is sprayed on the top surface of the block, causing the hamster to slide down. Friction between the block and the scale is large enough that the block does not slip on the scale. What does the scale read, in grams, as the hamster slides down?
Teams red and blue are having a tug-of-war. According to Newton’s third law, the force with which the red team pulls on the blue team exactly equals the force with which the blue team pulls on the red team. How can one team ever win? Explain
In , find an expression for the acceleration of m1. The pulleys are massless and frictionless.
Hint: Think carefully about the acceleration constraint.
A meteorite falls toward the earth. What is the magnitude of the earth’s acceleration just before impact? The earth’s mass is.
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