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JAMB Physics 2024 Paper

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Question : 78

Total: 125

Calculate the power of an object which moves through a distance of 500cm in 1s on a frictionless surface by a horizontal force of 50N

200W
300W
350W
250W

Solution:

Concept:

Power is the rate at which work is done.

Explanation:

Given: horizontal force

F = 50\,\text{N}

, distance

s = 500\,\text{cm} = 5\,\text{m}

, time

t = 1\,\text{s}

.

Work done is calculated as:

W = F \times s = 50 \times 5 = 250\,\text{J}

Power is work done per unit time:

P = \frac{W}{t} = \frac{250}{1} = 250\,\text{W}

Therefore, the object moves with a power of

250\,\text{W}

.

Answer:

D.

250\,\text{W}

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