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A heavy box is slid across a rough floor...

A heavy box is slid across a rough floor with an initial speed of 4 m/s. It stops moving after 8 seconds. If the average resisting force of friction is 10 N, the mass of the box (in kg) is

A

40

B

20

C

5

D

2.5

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AAKASH INSTITUTE-LAWS OF MOTION-Assignment (SECTION-A)
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  5. An object of mass 1 kg moving on a horizontal surface with initial ve...

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  7. If a block moving up an inclined plane at 30^(@) with a velocity of 5 ...

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  10. A horizontal force of 10N is necessary to just hold a block stationary...

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