Two Identical Blocks Are Pulled Along a Rough Surface as Suggested

question 13

Multiple Choice

Two identical blocks are pulled along a rough surface as suggested in the figure.Which one of the following statements is false?

• A)The coefficient of kinetic friction is the same in each case.
• B)A force of the same magnitude is needed to keep each block moving.
• C)A force of the same magnitude was required to start each block moving.
• D)The normal force exerted on the blocks by the surface is the same for both blocks.
• E)The magnitude of the force of kinetic friction is greater for the block on the right.

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