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A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15 m s−1How long does the body take to stop?
  • a)
    1.7.0 s
  • b)
    6.0 s
  • c)
    5.0 s
  • d)
    none
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A constant retarding force of 50 N is applied to a body of mass 20 kg ...
According to Newton's second Law
Force = mass x accleration
F = m.a
   = m.v/t
t  = m.v/F
   = 20x15/50
   = 6 sec
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A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15 m s−1How long does the body take to stop?a)1.7.0 sb)6.0 sc)5.0 sd)noneCorrect answer is option 'B'. Can you explain this answer?
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