Question

a lift of mass 400 kg is hung by a wire calculate the tension in the wire when the left
(a). moving upward with a constant velocity horse 2.0 m/s
(b). moving upward with a acceleration of 2.0m/s square
(c). moving downward with a acceleration of 2.0m/s square ​

Answer 1

a) Tension = mg = 400×10 = 4000N

b) Tension = mg + ma = 4000+800 = 4800N

c) Tension = mg - ma = 4000-800 = 3200N

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