7. A 400KN block is resting on a rough horizontal surface for which the coefficient of friction is 0.40. Determine the force P required to cause motion to impend if applied to the block 30° with the Horizontal. A. 225KN B. 230KN C. 235KN D. 240KN

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Chapter6: Applications Of Newton's Laws
Section: Chapter Questions
Problem 47P: (a) What is the maximum frictional force in the knee joint of a person who supports 66.0 kg of her...
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7. A 400KN block is resting on a rough horizontal surface for which the
coefficient of friction is 0.40. Determine the force P required to cause motion to
impend if applied to the block 30° with the Horizontal.
A. 225KN
В. 23ОKN
C. 235KN
D. 240KN
8. A 400KN block is resting on a rough horizontal surface for which the
coefficient of friction is 0.40. What minimum force is required to start motion?
А. 138.5KN
В. 148.5KN
C. 158.5KN
D. 168.5KN
Transcribed Image Text:7. A 400KN block is resting on a rough horizontal surface for which the coefficient of friction is 0.40. Determine the force P required to cause motion to impend if applied to the block 30° with the Horizontal. A. 225KN В. 23ОKN C. 235KN D. 240KN 8. A 400KN block is resting on a rough horizontal surface for which the coefficient of friction is 0.40. What minimum force is required to start motion? А. 138.5KN В. 148.5KN C. 158.5KN D. 168.5KN
For question no. 9, 10, and 11 refer to the figure below.
|500
45
9. The 500KN is in contact with a 45° inline. The coefficient of static friction is
0.25. Compute the value of the horizontal force P necessary to Just start the
block up the incline.
A. 822KN
В. 832KN
C. 842KN
D. 852KN
10. The 500KN is in contact with a 45° inline. The coefficient of static friction is
0.25. Compute the value of the horizontal force P necessary to Just prevent
motion down the incline.
A. 100KN
B. 200KN
C. 300KN
D. 400KN
11. The 500KN is in contact with a 45° inline. The coefficient of static friction is
0.25. If P=400, What is the amount and direction of the friction force.
А. 340KN
B.440KN
C. 540KN
D. 640KN
Transcribed Image Text:For question no. 9, 10, and 11 refer to the figure below. |500 45 9. The 500KN is in contact with a 45° inline. The coefficient of static friction is 0.25. Compute the value of the horizontal force P necessary to Just start the block up the incline. A. 822KN В. 832KN C. 842KN D. 852KN 10. The 500KN is in contact with a 45° inline. The coefficient of static friction is 0.25. Compute the value of the horizontal force P necessary to Just prevent motion down the incline. A. 100KN B. 200KN C. 300KN D. 400KN 11. The 500KN is in contact with a 45° inline. The coefficient of static friction is 0.25. If P=400, What is the amount and direction of the friction force. А. 340KN B.440KN C. 540KN D. 640KN
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