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A palm fruit dropped to the ground from the top of a tree 45m tall....

Physics
JAMB 1978
A palm fruit dropped to the ground from the top of a tree 45m tall. How long does it take to reach the ground? (g = 10ms-2)
  • A. 9s
  • B. 4.5s
  • C. 6s
  • D. 7.5s
  • E. 3s
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Correct Answer: Option E
Explanation
Using the equation of motion

S = ut + \(\frac{1}{2}\)at2

45 = (0 x t) + (\(\frac{1}{2}\) x 10 x t2)

t = 3s
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WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
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WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Post UTME Past Questions Agent