A Spring of Spring Constant K Is Attached to a Block

question 33

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.