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A Spring of Spring Constant K Is Attached to a Block

Question 54

Multiple Choice

A spring of spring constant k is attached to a block of mass m.The spring moves the block through a displacement x.How can you calculate how much work the spring does on the block?

A) Multiply the spring force, kx, by the distance x.
B) Multiply the spring force, ½ kx², by the distance x.
C) Integrate the spring force, kx, over the distance x.
D) Integrate the spring force, ½ kx², over the time it takes the block to move.
E) You cannot calculate this without knowing the acceleration of the block.

Correct Answer: