ï»¿ The mass of a lift is 2000 kg. When the tension in the supporting cable is 28000 N, then its acceleration isÂ  from Physics Laws of Motion Class 11 Manipur Board

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The mass of a lift is 2000 kg. When the tension in the supporting cable is 28000 N, then its acceleration isÂ

• 30 ms-2 downward

• 4Â ms-2Â  upwards

• Â 4Â ms-2Â  downwards

• 14Â ms-2Â  upwards

B.

4Â ms-2Â  upwards

Apparent weight > actual weight, then the lift is accelerating upward.

Lift is accelerating upward at the rate of aÂ
Hence, equation of motion is written as
R - mg = ma

28000-20000 = 2000a

a = 8000/2000 = 4Â ms-2Â upwards.

Apparent weight > actual weight, then the lift is accelerating upward.

Lift is accelerating upward at the rate of aÂ
Hence, equation of motion is written as
R - mg = ma

28000-20000 = 2000a

a = 8000/2000 = 4Â ms-2Â upwards.

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