College Physics
1st Edition
ISBN: 9781938168000
Author: Paul Peter Urone, Roger Hinrichs
Publisher: OpenStax College
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Chapter 5, Problem 7PE
Consider the 65.0-kg ice skater being pushed by two others shown in Figure 5.21. (a) Find the direction and magnitude of Ftot, the total force exerted on her by the others, given that the magnitudes F1and F2are 26.4 N and 18.6 N, respectively. (b) What is her initial acceleration if she is initially stationary and wearing steel-bladed skates that point in the direction of Ftot? (c) What is her acceleration assuming she is already moving in the direction of Ftot? (Remember that friction always acts in the direction opposite that of motion or attempted motion between surfaces in contact.) 
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Consider the 65.0-kg ice skater being pushed by two others shown. Find the direction and magnitude of Ftot, the total force exerted on her by the others, given that the magnitudes F1 and F2 are 26.4 N and 18.6 N, respectively. (b) What is her initial acceleration if she is initially stationary and wearing steel-bladed skates that point in the direction of Ftot? (c) What is her acceleration assuming she is already moving in the direction of Ftot?
(Remember that friction always acts in the direction opposite that of motion or attempted motion between surfaces in contact.)
A boat moves through the water with two forces acting on it. One is a 1500 N forward push by the water on the propeller, and the other is an 1300 N resistive force dueto the water around the bow.
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Two blocks, with masses 4.00 kg and 8.00 kg, are connected by a string and slide down a 30.0o inclined plane (Figure 1). The coefficient of kinetic friction between the 4.00 kg block and the plane is 0.250; that between the 8.00 kg block and the plane is 0.350.
(A) Calculate the acceleration of the smaller block. (Express your answer with the appropriate units.)
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Chapter 5 Solutions
College Physics
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