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WAEC Physics 2023 Paper

Question : 39

Total: 50

The acceleration of P is greater than that of Q and both are in the same direction.
The acceleration of P is less than that of Q and both are in the same direction.
The acceleration of P is equal to that of Q and both are in the same direction.
The acceleration of P is equal to that of Q and are in opposite directions.

Solution:

Concept:

For bodies moving under gravity alone, the acceleration is the acceleration due to gravity, which is constant near the Earth’s surface.

Explanation:

Ball P is released from the roof and falls freely.

Ball Q is thrown upward, but after leaving the hand, only gravity acts on it.

Gravity gives both balls the same downward acceleration:

g = 9.8 \, \text{m/s}^2

For P, this acceleration causes it to speed up downward.

For Q, this same downward acceleration slows its upward motion, then pulls it back down.

Thus, the accelerations of P and Q are equal in magnitude and both act downward, so they are in the same direction.

Answer:

C. The acceleration of P is equal to that of Q and both are in the same direction.

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