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Chapter 7: Q. 34 (page 179)
The two blocks in FIGUREare sliding down the incline. What is the tension in the massless string?
Tension in the massless string is.
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FIGURE Pshows two strong magnets on opposite sides of a small table. The long-range attractive force between the magnets keeps the lower magnet in place.
a. Draw an interaction diagram and draw free-body diagrams for both magnets and the table. Use dashed lines to connect the members of an action/reaction pair.
b. The lower magnet is being pulled upward against the bottom of the table. Suppose that each magnet鈥檚 weight is and that the magnetic force of the lower magnet on the upper magnet is . How hard does the lower magnet push against the table?
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?
How does a rocket take off What is the upward force on itYour explanation should include an interaction diagram and free-body diagrams of the rocket and of the parcel of gas being exhausted.
A 70 kg tightrope walker stands at the center of a rope. The rope supports are 10 m apart and the rope sags 100 at each end. The tightrope walker crouches down, then leaps straight up with an acceleration of 8.0 m/s2 to catch a passing trapeze. What is the tension in the rope as he jumps?
A rope hangs from the ceiling. What is the tension at the midpoint of the rope?
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