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An external force of magnitude 100N acts on a particle of mass 0.15kg for 0.03s....

Physics
WAEC 2007
An external force of magnitude 100N acts on a particle of mass 0.15kg for 0.03s. Calculate the change in the speed of the particle
  • A. 50ms-1
  • B. 25ms-1
  • C. 20ms-1
  • D. 5ms-1
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Correct Answer: Option C
Explanation
a = \(\frac{F}{m} = \frac{100}{0.15} = 666.7\)

v = u + at

= 0 + 66.7 x 0.03

= 20m/s2
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts