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WAEC Physics 2013 Paper

Question : 13

Total: 46

The velocity ratio of an inclined plane

Solution:

Concept:

For an inclined plane, the velocity ratio is

\frac{\text{length of plane}}{\text{height}} = \frac{1}{\sin\theta}

Explanation:

The velocity ratio is given by

VR = \frac{1}{\sin\theta}

, where

\theta

is the angle of inclination.

\theta

decreases,

\sin\theta

decreases, so

\frac{1}{\sin\theta}

increases.

Therefore, the velocity ratio increases with a decrease in the angle of inclination.

Answer:

B. increases with decrease in the angle of inclination.

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