Question

Which of the following is correct about work for an object of mass ${}^{\prime }{m}^{\prime }$ displaced vertically by a distance of ${}^{\prime }{h}^{\prime }?$

• A. Work has only magnitude
• B. Work has only direction
• C. Work has both magnitude and direction
• D. Work may or may not have both magnitude and direction depending on type of work

Answer 1

Answer: (A), (B)

The correct options are
A

Work has only magnitude

B

Work has only direction

Work is expressed as the product of force and displacement. It is a scalar quantity. It has only magnitude and no direction. When an object of mass $m$ is displaced vertically by a distance $h$, there is a gravitational force acting on the object, which is given by $F=mg$. Work done against gravitational force is given by $\text{F}\times h=m\times g\times h$