A force $\vec{F} = (3\hat{i} + 4\hat{j})$ N acts on a particle displacing it by $\vec{s} = (2\hat{i} - 5\hat{j})$ m. The work done by the force is:

A point of application of a force ${\rm{\vec F}} = 5\hat i - 4\hat j + 2\hat k$ is moved from $\overrightarrow {{{\rm{r}}_1}} = 2\hat i + 7\hat j + 4\hat k\,to\,\overrightarrow {{{\rm{r}}_2}} = 5\hat i + 2\hat j + 3\hat k$ the work done is

A body of mass 5 kg is placed at the origin, and can move only on the x-axis. A force of 10 N is acting on it in a direction making an angle of ${60^0}$ with the x-axis and displaces it along the x-axis by 4 metres. The work done by the force is

A force $\vec{F} = (3\hat{i} + 4\hat{j})$ N acts on a particle displacing it by $\vec{s} = (2\hat{i} - 5\hat{j})$ m. The work done by the force is:

A horizontal force of 5N is required to maintain a velocity of 2 m/s for a block of 10 kg mass sliding over a rough surface. The work done by this force in one minute is

If the work done by a force is zero, which of the following must be true?

You lift a heavy book from the floor of the room and keep it in the book–shelf having a height 2 m. In this process you take 5 seconds. The work done by you will depend upon

A block of mass 2 kg is pulled up a rough inclined plane of inclination $30^\circ$ with a constant force $F$ parallel to the incline. The coefficient of kinetic friction between the block and the plane is 0.2. If the block moves with a constant speed of 2 m/s, the power delivered by the force $F$ is:

A force of 1200 N acting on a stone by means of rope slides the stone through a distance of 10 m in a direction inclined at ${60^0}$ to the force. The work done by the force is [Joules].

If $\overrightarrow F = 2\widehat i + 3\widehat j + 4\widehat k$ acts on a body and displaces it by $\overrightarrow S = 3\widehat i + 2\widehat j + 5\widehat k$ then the work done by the force is

A person carries a 20 kg suitcase horizontally across a room of length 10 m. How much work is done by the person on the suitcase?