A Force Pushes a Block Along a Horizontal Surface

question 32

Multiple Choice

A force pushes a block along a horizontal surface against a force of friction _f. If the block undergoes a displacement s at constant velocity, the work done by the resultant force on the block

• A) is equal to the work done by the force of friction _f
• B) is given by W = ·
• C) increases the kinetic energy of the block.
• D) increases the potential energy of the block.
• E) is zero.

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