College Physics
10th Edition
ISBN: 9781285737027
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Textbook Question
Chapter 4.5, Problem 4.6QQ
For the woman being pulled forward on the toboggan in Figure 4.33, is the magnitude of the normal force exerted by the ground on the toboggan (a) equal to the total weight of the woman plus the toboggan, (b) greater than the total weight, (c) less than the total weight, or (d) possibly greater than or less than the total weight, depending on the size of the weight relative to the tension in the rope?
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A mule is harnessed to a sled having a mass of 226 kg, including supplies. The mule must exert a force exceeding 1230 N at
an angle of 34.30 (above the horizontal) in order to get the sled moving. Treat the sled as a point particle.
HINT
(a) Calculate the normal force (in N) on the sled when the magnitude of the applied force is 1230 N. (Enter the
magnitude.)
N
(b) Find the coefficient of static friction between the sled and the ground beneath it.
(c) Find the static friction force (in N) when the mule is exerting a force of 6.15 x 10² N on the sled at the same angle.
(Enter the magnitude.)
N
A mule is harnessed to a sled having a mass of 261 kg, including supplies. The mule must exert a force exceeding 1270 N at an angle of 38.3° (above the horizontal) in order to get the sled moving. Treat the sled as a point particle.
(a)
Calculate the normal force (in N) on the sled when the magnitude of the applied force is 1270 N. (Enter the magnitude.)
(b)
Find the coefficient of static friction between the sled and the ground beneath it.
(c)
Find the static friction force (in N) when the mule is exerting a force of 6.35 ✕ 102 N on the sled at the same angle. (Enter the magnitude.)
A donkey is harnessed to a sled having a mass of 251 kg, including supplies. The donkey must exert a force exceeding 1230 N at an angle of 34.3° (above the horizontal) in order to get the sled moving. Treat the sled as a point particle.
(a)
Calculate the normal force (in N) on the sled when the magnitude of the applied force is 1230 N. (Enter the magnitude.)
(b)
Find the coefficient of static friction between the sled and the ground beneath it.
(c)
Find the static friction force (in N) when the donkey is exerting a force of 6.15 ✕ 102 N on the sled at the same angle. (Enter the magnitude.)
Chapter 4 Solutions
College Physics
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