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  • Solve this problem A person of mass 60 kg is inside a lift of mass 940 kg and presses the button on control panel. The lift starts moving upwards with an acceleration 1.0m/s2. If g=10ms-2, the tension in the supporting cable is

A person of mass 60 kg is inside a lift of mass 940 kg and presses the button on control panel. The lift starts moving upwards with an acceleration 1.0m/s2. If g=10ms-2, the tension in the supporting cable is

  • Option 1)

    8600N

  • Option 2)

    9680N

  • Option 3)

    11000N

  • Option 4)

    1200N

 

Answers (1)

best_answer

As we discussed in concept

Non Inertial Frame of Reference -

Accelerated frames are Non Inertial.

Examples- car moving with uniform circular motion, plane which is taking off.

- wherein

Newton's law are not valid 

vec a eq0,      if vec{F}= 0

ast pseudo left ( -mvec{a} ight ) act on the body.

- means direction opposite  

 

 T - (M+m) g       = (m+m) a

T  = (m+m) (g+a)

T = (940+60) (1+10)    = 11000 N

 


Option 1)

8600N

This option is incorrect.

Option 2)

9680N

This option is incorrect.

Option 3)

11000N

This option is correct.

Option 4)

1200N

This option is incorrect.

Posted by

prateek

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