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In Exercises 77-78, round answers to the nearest pound. 77. a. Find the magnitude of the force required to keep a 3500-pound car from sliding down a hill inclined at 5.5° from the horizontal. b. Find the magnitude of the force of the car against the hill. 78. a. Find the magnitude of the force required to keep a 280-pound barrel from sliding down a ramp inclined at 12.5° from the horizontal. b. Find the magnitude of the force of the barrel against the ramp.

In Exercises 77-78, round answers to the nearest pound. 77. a. Find the magnitude of the force required to keep a 3500-pound car from sliding down a hill inclined at 5.5° from the horizontal. b. Find the magnitude of the force of the car against the hill. 78. a. Find the magnitude of the force required to keep a 280-pound barrel from sliding down a ramp inclined at 12.5° from the horizontal. b. Find the magnitude of the force of the barrel against the ramp.

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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In Exercises 77-78, round answers to the nearest pound. 77. a. Find the magnitude of the force required to keep a 3500-pound car from sliding down a hill inclined at 5.5° from the horizontal. b. Find the magnitude of the force of the car against the hill. 78. a. Find the magnitude of the force required to keep a 280-pound barrel from sliding down a ramp inclined at 12.5° from the horizontal. b. Find the magnitude of the force of the barrel against the ramp.
Transcribed Image Text:In Exercises 77-78, round answers to the nearest pound. 77. a. Find the magnitude of the force required to keep a 3500-pound car from sliding down a hill inclined at 5.5° from the horizontal. b. Find the magnitude of the force of the car against the hill. 78. a. Find the magnitude of the force required to keep a 280-pound barrel from sliding down a ramp inclined at 12.5° from the horizontal. b. Find the magnitude of the force of the barrel against the ramp.
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