Question: The 4 9 9 - N force is applied to the 9 1 - kg block, which is stationary before the force is applied. Determine

The

499 -

N force is applied to the

91 -

kg block, which is stationary before the force is applied. Determine the magnitude and direction of the friction force Fexerted by the horizontal surface on the block. The force is positive if to the right, negative if to the left.

Answer: F

=!

The 4 9 9 - N force is applied to the 9 1 - kg

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