A Child Applies the Brakes on a Bicycle by Applying

question 7

Multiple Choice

A child applies the brakes on a bicycle by applying a downward force of 25 pounds on the pedal when the crank makes a angle with the horizontal (see figure) . The crank is 6 inches in length. Find the torque at P. Round your answer to two decimal places.

• A) 12.50 ft-lb
• B) 6.25 ft-lb
• C) 75.00 ft-lb
• D) 10.83 ft-lb
• E) 21.65 ft-lb

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A sticky, slippery substance produced by mucous membranes and glands, used to moisten, protect, and trap particles in the airways, digestive system, and other areas.

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Carbohydrates

Organic compounds consisting of carbon, hydrogen, and oxygen, serving as a major energy source in the diet of animals and humans.

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A blood plasma protein that's essential in blood clot formation.