80. A 15-kg crate starts at rest at the top of a 60.0° incline. The coefficients of friction are μ = 0.40 and Mk = 0.30. The crate is connected to a hanging 8.0-kg box by an ideal rope and pulley. (a) As the crate slides down the incline, what is the tension in the rope? (b) How long does it take the crate to slide 2.00 m down the incline? (c) To push the crate back up the incline at constant speed, with what force should you push on the crate (parallel to the incline)? (d) What is the smallest mass that you could substi- tute for the 8.0-kg box to keep the crate from sliding down the incline?
80. A 15-kg crate starts at rest at the top of a 60.0° incline. The coefficients of friction are μ = 0.40 and Mk = 0.30. The crate is connected to a hanging 8.0-kg box by an ideal rope and pulley. (a) As the crate slides down the incline, what is the tension in the rope? (b) How long does it take the crate to slide 2.00 m down the incline? (c) To push the crate back up the incline at constant speed, with what force should you push on the crate (parallel to the incline)? (d) What is the smallest mass that you could substi- tute for the 8.0-kg box to keep the crate from sliding down the incline?
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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