Question

# Use the following diagram to answer the question. Neglect the affect of resistance forces. The object's kinetic energy at point C is less than its kinetic energy at point ____.

A
A only
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B
A, D, and E
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C
B only
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D
D and E
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Solution

## The correct option is D B onlySince the total mechanical energy is conserved, kinetic energy (and thus, speed) will be greatest when the potential energy is smallest. Point B is the only point that is lower than point C. The reasoning would follow that point B is the point with the smallest PE, the greatest KE, and the greatest speed. Therefore, the object will have less kinetic energy at point C than at point B (only).

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