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A man is supplying a power of 500 W at an instant on a massless string as shown in figure. If at that instant speed of block is 10 m/s and increasing at the rate of 10 m/s2. Then the mass of block is

 

Option: 1

2.5 kg


Option: 2

 4 kg


Option: 3

6 kg


Option: 4

1 kg


Answers (1)

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Answer (1)

T-mg = ma\\ T = 20\;m\\ P=\vec{T}.\vec{v}\\ 500=20\;m \times10\\ m=2.5\;kg

 

Posted by

Ritika Jonwal

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