COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 4, Problem 2QAP
To determine
Whether the object is at rest or not if the sum of forces acting on an object equals zero.
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If an object is moving, is it possible for the net force acting on it to be zero?
A train locomotive pulls a train with a mass of 1.10 ✕ 10^7kg on level rails. The locomotive exerts a constant force of 6.90 ✕ 10^5N on the train. How much time does it take to increase the speed of the train from rest to 64.0 km/h? (Ignore any resistance force from the rails on the wheels of the train. Enter your answer in minutes.)
Two forces act on an 5 kg object: F1 = 60N applied at the
origin in the direction of positive x- axis, and F2 = 40N,
also applied at the origin but in the direction of positive y-
axis. Find the direction of the net Force (Hint: its given by
the angle between positive x-axis and the direction of net
force)
Chapter 4 Solutions
COLLEGE PHYSICS
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- Does the ground need to exert a force on you for you to jump off the ground, or do you need to exert a force on the ground? If the ground must exert a force on you, is that force greater than the force you exert on the ground?arrow_forwardA 3.00-kg object is moving in a plane, with its x and y coordinates given by x = 5t2 1 and y = 3t3 + 2, where x and y are in meters and t is in seconds. Find the magnitude of the net force acting on this object at t = 2.00 s.arrow_forwardAn object experiences no acceleration. Which of the following cannot be true for the object? (a) A single force acts on the object. (b) No forces act on the object. (c) Forces act on the object, but the forces cancel.arrow_forward
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