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A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the balance reads 49 N when the lift is stationary. If the lift moves downwards with an acceleration of 5 m/s2, the reading of the spring balance would be
  • a)
    24 N
  • b)
    74 N
  • c)
    15 N
  • d)
    49 N
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
A spring balance is attached to the ceiling of a lift. A man hangs his...
Weight =mg =49 Newton (when lift is stationary) when lift is moving downward with acceleration then weight =m(g-a) so divide both W1/W2 =mg /m(g-a) 49/W2=10/10-5= then W2 =24.5N
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Community Answer
A spring balance is attached to the ceiling of a lift. A man hangs his...
When lift moves downwards, weight WF=m(g-a);m is mass,g is acceleration due to gravity and a is acceleration of lift.
WF=49(9.8-5)
WF=49×4.8
WF=235.2
W=235.2÷9.8
=24
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A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the balance reads 49 N when the lift is stationary. If the lift moves downwards with an acceleration of 5 m/s2, the reading of the spring balance would bea)24 Nb)74 Nc)15 Nd)49 NCorrect answer is option 'A'. Can you explain this answer?
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