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a man weighs 70kg.He stands on weighing scale in a lift is moving.

Asked by 8th March 2013, 10:36 AM
Answered by Expert
Answer:
(a) Force on the man in the upward direction = mass of the man x acc. of the lift in the upward direction = 70 x10= 700 N
(b) downwards with a uniform acceleration of 5m/s
force by the mass of the man in the downward direction = 70 x 5 = 350 N
(c)upwards with a uniform acceleration of 5 m/s
Force on the man in the upward direction = mass of the man x acc. of the lift in the upward direction = R = m(g+a)= 70 x(10+5)  = 1050 N
Answered by Expert 11th March 2013, 3:16 PM
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