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A body of mass 42 kg increases its speed from 15 ms\(^{-1}\) to 43 ms\(^{-1}\) in...

Further Mathematics
WAEC 2024

A body of mass 42 kg increases its speed from 15 ms\(^{-1}\) to 43 ms\(^{-1}\) in 12 seconds. Find the force acting on the body.

  • A. 203N
  • B. 150N
  • C. 98N
  • D. 52N
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Correct Answer: Option C
Explanation

Using F = \(\frac{M(u_2 - u_1)}{t}\)

F = \(\frac{42 (43 - 15)}{12}\) = \(\frac{42 \times 28}{12}\) = \(\frac{1176}{12}\) = 98N


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