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A force of 10 N, acting continuously, increases the kinetic energy of an object from...

Physics
WAEC 2021

A force of 10 N, acting continuously, increases the kinetic energy of an object from 20.J to 60 J. Find the distance moved by the object.   

  • A. 200m     
  • B. 40m    
  • C. 4m 
  • D.  400m
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Correct Answer: Option C
Explanation

according to the work-energy theorem; Workdone = change in kinetic energy.

W = ∆ K.E

force x distance = \(K.E_2 - K.E_2\)

10 x s = 60 - 20 

s = \(\frac{40}{10}\) = 4m.


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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC offline past questions - with all answers and explanations in one app - Download for free
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC offline past questions - with all answers and explanations in one app - Download for free