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A 12-kg block of steel is at rest on a horizontal table. The coefficient of static friction between block and table is 0.52. (a) What is the magnitude of the horizontal force that will just start the block moving? (b) What is the magnitude of a force acting upward 62° from the horizontal that will just start the block moving? (c) If the force acts down at 62° from the horizontal, how large can it be without causing the block to move?

A 12-kg block of steel is at rest on a horizontal table. The coefficient of static friction between block and table is 0.52. (a) What is the magnitude of the horizontal force that will just start the block moving? (b) What is the magnitude of a force acting upward 62° from the horizontal that will just start the block moving? (c) If the force acts down at 62° from the horizontal, how large can it be without causing the block to move?

Grade:upto college level

1 Answers

Navjyot Kalra
askIITians Faculty 654 Points
8 years ago
232-2121_1.PNG
Round off to two significant figures,
F = 61 N
Therefore the force experienced by the block when the force acts horizontally is 61 N.

232-399_1.PNG
Round off to two significant figures,
F = 66 N
Therefore the force experienced by the block when the force acts at an angle of 62° upwards is 66 N .
232-1779_1.PNG
Round of to two significant figures, 232-1579_1.PNG

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