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Chapter 6: Q.17 (page 155)
A woman has a mass of 55 kg.
a. What is her weight while standing on earth?
b. What are her mass and her weight on Mars, where g = 3.76 m/s2 ?
a.
b.
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A stubborn, 120 kg mule sits down and refuses to move. To drag the mule to the barn, the exasperated farmer ties a rope around the mule and pulls with his maximum force of 800 N. The coefficients of friction between the mule and the ground are ms = 0.8 and mk = 0.5. Is the farmer able to move the mule?
.
a. Write a realistic problem for which these are the correct equations.
b. Draw the free-body diagram and the pictorial representation for your problem.
c. Finish the solution of the problem.
You're driving along atwith your aunt's valuable antiques in the back of your pickup truck when suddenly you see a giant hole in the road ahead of you. Fortunately, your foot is right beside the brake and your reaction time is zero!
a. Can you stop the truck before it falls into the hole?
b. If your answer to part a is yes, can you stop without the antiques sliding and being damaged? Their coefficients of friction are and.
The three ropes inare tied to a small, very light ring. Two of the ropes are anchored to walls at right angles, and the third rope pulls as shown. What are and , the magnitudes of the tension forces in the first two ropes?
A kg truck is parked on a slope. How big is the friction force on the truck? The coefficient of static friction between the tires and the road is .
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