Test Index

WAEC Physics 2018 Paper

© africaexams.com

Question : 10

Total: 50

A body is projected with an initial velocity u at angle

\theta

to the horizontal. If

R_{\max}

is the maximum range of the projectile, what does the relation

\frac{u^2}{R_{\max}}

represent?

The vertical distance covered
Acceleration due to gravity
The horizontal distance covered
The acceleration of the body

Solution:

Concept:

Maximum range of a projectile depends on the acceleration due to gravity

g

.

Explanation:

For maximum range, the angle of projection is

45^\circ

, and the formula is:

R_{\max} = \frac{u^2}{g}

Rearranging this equation gives:

g = \frac{u^2}{R_{\max}}

Therefore, the expression

\frac{u^2}{R_{\max}}

gives the value of the acceleration due to gravity

g

.

Answer:

B. Acceleration due to gravity.

© africaexams.com

Go to Question:

Prev Question

Next Question