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Find the force exerted by 5kg block on f...

Find the force exerted by 5kg block on floor of lift, as shown in figure. ( Take ,`g=10 ms^(-2)`)

A

100 N

B

115 N

C

105 N

D

135 N

Text Solution

Verified by Experts

The correct Answer is:
C

( c)
`N-70=7xx5`……(i)
`therefore N=105 N`
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DC PANDEY-LAWS OF MOTION-Check point 5.3
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  2. Three blocks of masses m(1),m(2)and m(3) are connected by massless str...

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  3. A 50 kg boy stands on a platform spring scale in a lift that is going...

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  4. An elevator and its load have a total mass of 800 kg. If the elevator,...

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  5. The surface are frictionless, the ratio of T(1) and T(2) is

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  6. Two blocks of masses 2 kg and 1 kg are in contact with each other on a...

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  7. Three blocks are placed at rest on a smooth inclined plane with force ...

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  8. In the arrangement shown, the mass m will ascend with an acceleration ...

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  9. Two masses are connected by a string which passes over a pulley accele...

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  10. Three equal weight A,B and C of mass 2kg each are hanging on a string ...

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  11. A string of negligible mass going over a clamped pulley of mass m supp...

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  12. The acceleration of the 2 kg block if the free end of string is pulled...

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  13. In the arrangement shown in the figure, the pulley has a mass 3m, Negl...

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  14. In the figure given below, with what accelerating does the block of ma...

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  15. Three masses of 1kg, 6 kg and 3 kg are connected to each other with th...

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  16. In the figure given below masses m and m' are tied with a thread passi...

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  17. A block of mass 200kg is set into motion on a frictionless , horizonta...

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  18. Two masses M(1) " and " M(2) are attached to the ends of a string whic...

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  19. Two blocks, each having a mass M, rest on frictionless surfaces as sho...

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  20. Two bodies of masses m(1) " and " m(2) are connected a light string wh...

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