Two blocks of masses $m_1$ and $m_2$ are connected by a light inextensible string passing over a smooth pulley. The work done by the tension on $m_1$ as it moves a distance $h$ upwards is:

A body in equilibrium may not have

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

When a body moves in a circular path, no work is done by the force since,

A force of 5 N moves the particle through a distance of 10 m. If 25 J of work is performed, then the angle between the force and the direction of motion 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 force $\vec{F} = (3\hat{i} + 4\hat{j})$ N acts on a particle and displaces it by $\vec{s} = (5\hat{i} - 2\hat{j})$ m. The work done by the force is:

A book is held at a constant height above the ground. How much work is done by the person holding the book?

Work done when a force, ${\rm{\vec F}} = \left( {\hat i + 2\hat j + 3\hat k} \right)$ N acting on a particle takes it from the point ${{\rm{\vec r}}_1} = \left( {\hat i + \hat j + \hat k} \right)$ m to the point ${{\rm{\vec r}}_2} = \left( {\hat i + \hat j + 2\hat k} \right)$

Under the influence of a force $\vec{F} = (-\hat{i} + 3\hat{j} + 2\hat{k})$ N, an object undergoes a displacement from $\vec{r_1} = (4\hat{i} + \hat{j})$ m to $\vec{r_2} = (\hat{i} - 2\hat{j} + 5\hat{k})$ m. Calculate the work done by the force.

A body constrained to move in Y direction, is subjected to a force given by ${\rm{\vec F}} = \left( { - 2\hat i + 15\hat j + 6\hat k} \right)$ N done by this force in moving the body through a distance of 10m along Y axis?