A box starting from rest slides down from the top of a frictionless plane which is 3m long and inclined 300 with the horizontal. (a) find the velocity of the box as it reaches the foot of the plane (b) how long does it take the box to reach the bottom of the plane?

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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A box starting from rest slides down from the top of a frictionless plane which is 3m long and inclined 300 with the horizontal. (a) find the velocity of the box as it reaches the foot of the plane (b) how long does it take the box to reach the bottom  of the plane?

 

An elevator weighing 9800N is supported by a steel cable. (a) Find the tension in the cable at rest, when the elevator is moving up at a uniform speed of 1m/s, and when it is descending at a constant speed of 3m/s. (b) Find the tension in the cable when the elevator is accelerated upward at 5m/s2. (c) Find the tension in the cable when it is descending with an acceleration of 5m/s2.

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