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Chapter 7: Q. 12 (page 176)
The figure shows two masses at rest. The string is massless and the pulleys are frictionless. The spring scale reads in kg. What is the reading of the scale?
The reading of the spring scale is
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A tightrope walker stands at the center of a rope. The rope supports are apart and the rope sags at each end. The tightrope walker crouches down, then leaps straight up with an acceleration of to catch a passing trapeze. What is the tension in the rope as he jumps?
Two packages at UPS start sliding down theramp shown in FIGURE . Package A has a mass of and a coefficient of friction of . Package B has a mass of and a coefficient of friction of How long does it take package A to reach the bottom?
A rope hangs from the ceiling. What is the tension at the midpoint of the rope?
A small car is pushing a large truck. They are speeding up. Is the force of the truck on the car larger than, smaller than, or equal to the force of the car on the truck?
A mosquito collides head-on with a car traveling Is the magnitude of the mosquito’s acceleration larger than, smaller than, or equal to the magnitude of the car’s acceleration? Explain.
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