Work, Energy and Power

Related Questions

• A force applied by an engine of a train of mass $2.05 \times {10^6}kg$ changes its velocity from $5m/s$ to 25$m/s$ in $5$ minutes. The power of the engine is

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• Two springs of spring constants 1500 N/m and 3000 N/m respectively are stretched with the same force. They will have potential energy in the ratio

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• A uniform chain of length 2m is kept on a table such that a length of 60cm hangs freely from the edge of the table. The total mass of the chain is 4kg. What is the work done in pulling the entire chain on the table

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• A cord is used to lower vertically a block of mass M by a distance d with constant downward acceleration $\frac{g}{4}$. Work done by the cord on the block is

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• Which of the following statements is true

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