a) A rigid, uniform rod has a length L and a weight of 200 N. An object weighing 300 N h from the left end of the rod, and another object weighing 400 N hangs from the s end. L 3L Calculate: i) the magnitude of the force exerted on the rod that will cause the rod to be in equ rium;
a) A rigid, uniform rod has a length L and a weight of 200 N. An object weighing 300 N h from the left end of the rod, and another object weighing 400 N hangs from the s end. L 3L Calculate: i) the magnitude of the force exerted on the rod that will cause the rod to be in equ rium;
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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Transcribed Image Text:Question B2
a) A rigid, uniform rod has a length L and a weight of 200 N. An object weighing 300 N hangs
from the left end of the rod, and another object weighing 400 N hangs from the same
end.
Calculate:
i) the magnitude of the force exerted on the rod that will cause the rod to be in equilib-
rium;
ii) and its distance from the left end of the rod.
b) i) An object of mass m is travelling with a constant speed v when it speeds up with a
constant acceleration. Calculate its speed when its kinetic energy is doubled.
ii) An object of mass m travelling with a constant speed v slows down with a constant
acceleration. Calculate its change in kinetic energy when the speed is reduced by
half.
c) A rock dropped straight down from a cliff covers one-third of its total distance to the ground
in the last second of its fall.
Calculate the height of the cliff from the ground. Air resistance is negligible.
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