Understanding Our Universe
Understanding Our Universe
3rd Edition
ISBN: 9780393614428
Author: PALEN, Stacy, Kay, Laura, Blumenthal, George (george Ray)
Publisher: W.w. Norton & Company,
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Chapter 3, Problem 18QAP
To determine

The force exerted by both balls on each other.

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Two masses, m₁ = 5.00 kg and m2 = 8.00 kg are separated by a distance of 8.00 cm. 4.2 x 10-7 N 5.3 x 10-10 N 1.0 x 10-7 N 3.6 x 10-6 N
A 75 kg woman on roller skates pushes a 25 kg girl, also on roller skates, with a force of 40 N. The force exerted by the girl on the woman is 40 N 100 N O zero 200 N 50 N
An accident victim with a broken leg is being placed in traction. The patient wears a special boot with a pulley attached to the sole. The foot and boot together have a mass of 4.0 kg, and the doctor has decided to hang a m = 6.2 kg mass from the rope. The boot is held suspended by the ropes and does not touch the bed. (Figure 1) Determine the amount of tension in the rope by using Newton’s laws to analyze the hanging mass. Assume that ϕ = 13 ∘ . Hint: If the pulleys are frictionless, which we will assume, the tension in the rope is constant from one end to the other.     The net traction force needs to pull straight out on the leg. What is the proper angle θ for the upper rope?         What is the net traction force pulling on the leg?
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