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A ball of mass 0.5kg moving at 10ms\(^{-1}\) collides with another ball of equal mass...

Physics
JAMB 2021

A ball of mass 0.5kg moving at 10ms\(^{-1}\) collides with another ball of equal mass at rest. If the two balls move off together after the impact, calculate their common velocity.

  • A. 0.2ms\(^{-1}\)
  • B. 0.5ms\(^{-1}\)
  • C. 5.0ms\(^{-1}\)
  • D. 5.5ms\(^{-1}\)
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Correct Answer: Option C
Explanation

Using; m\(_{1}\) u\(_{1}\) + m\(_{2}\) u\(_{2}\) = (m\(_{1}\) + m\(_{2}\))v

m\(_{1}\) = 0.5kg, u\(_{1}\) = 10ms\(^{1}\), m\(_{2}\) = 0.5kg, u\(_{1}\) = 0

\(\therefore\) (0.5kg x 10) + (0.5 x 0) = (0.5 + 0.5)v

v = 5ms\(^{1}\)

There is an explanation video available below.


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Explanation Video

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JAMB 2025 UTME Revisions Have Begun
WAEC GCE Nov/Dec 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 332996
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WAEC GCE Nov/Dec 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 332996