Work

Does work depend on frame of reference? Give an example.

The work done by a force is not dependent on the frame of reference.

What is work done? Explain the condition for minimum, maximum and zero work done.

The work done by a body against friction always results in

A block of mass $2 \mathrm{kg}$ initially at moves under the action of an applied horizontal force of $6 \mathrm{N}$ on a rough horizontal surface of coefficient of friction $0.1$. The work done by the applied force in $10\mathrm{ }\mathrm{s}$ is (take $g=10 \mathrm{m}\mathrm{ }{\mathrm{s}}^{-2}$)

A body of mass $10 \mathrm{kg}$is moving on an inclined plane of inclination $30°$ with an acceleration $2 \mathrm{m} {\mathrm{s}}^{-2}$ . The body starts from rest. Find the work done by force of friction in $2 \mathrm{seconds}$. Take $g=9·8 \mathrm{m} {\mathrm{s}}^{-2}$

A block of mass $10 \mathrm{kg}$ slides down a rough slope which is inclined at $45°$ to the horizontal. The coefficient of sliding friction is $0.30$. When the block has slide $5 \mathrm{m}$, the work done on the block by the force of friction is nearly

A body of mass$10 \mathrm{kg}$ is moving on a horizontal surface by applying a force of $10 \mathrm{N}$ in forward direction. If body moves with constant velocity, the work done by force of fiction for a displacement of $2 \mathrm{m}$ is