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A person is standing in an elevator. In ...

A person is standing in an elevator. In which situation he finds his weight less ?

A

when the elevator moves upward with constant acceleration

B

when the elevator moves downward with uniform velocity

C

when the elevator moves downward with uniform velocity

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
As elevator accelerates down, pseudo force acts upward.
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ALLEN -NEWTONS LAWS OF MOTION-EXERCISE-I
  1. A horizontal force of 10N is necessary to just hold a block stationary...

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  2. In the figure given below, the position time graph of a particle of ma...

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  3. A person is standing in an elevator. In which situation he finds his w...

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  4. Two weights w(1) and w(2) are suspended from the ends of a light strin...

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  5. A particle is moving under the influence of a force which is fixed in ...

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  6. A force of 10 Newton acts on a body of mass 20 kg for 10 seconds. Cha...

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  7. A rocket of mass 1000 kg is to be projected vertically upwards. The ga...

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  8. Three blocks of masses m(1),m(2)and m(3) are connected by massless str...

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  9. A 0.5 kg ball moving with a speed of 12 m//s strikes a hard wall at an...

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  10. A person used force (F) , shown in figure to move a load with constant...

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  11. The ratio of gravitational mass to inertial mass is equal to:

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  12. A given object takes n times as much time to slide down a 45^(@) rough...

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  13. The figure shows a horizontal force vecF acting on a block of mass M o...

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  14. A 150 g tenins ball coming at a speed of 40m/s is hit straight back by...

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  15. Three solids of masses m(1),m(2) and m(3) are connected with weightles...

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  16. Two blocks of masses M(1)=4 kg and M(2)=6kg are connected by a string ...

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  17. Three masses M(1), M(2) and M(3) are lying on a frictionless table. Th...

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  18. In Newton's second vecF=mveca (for constant mass m), veca is the accel...

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  19. A man of mass 90kg is standing in an elevator whose cable broke sudden...

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  20. A force vecF=(6hati-8hatj+10hatk)N produces acceleration of 1 ms^(-2) ...

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