1.

A person of mass 60kg is inside a lift of mass 940kg and presses the button on control panel . Then lift starts moving upwards with an acceleration 1.0m/s*2 ,the tension in the supporting cable is :

Answer» LET the mass of man be m1 = 60 kg
mass of the lift be M2 = 940 kg
total mass M = m1+m2= 60+940= 1000 Kg
acceleration DUE to GRAVITY = 9.8 m/s^2
acceleration of lift = - 1 m/s^2
T - mg = ma
T= ma + mg
T= m(a+g)
T= 1000(10.8)
T= 10800N


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