Question

A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force?

• A. Zero
• B. 1 J
• C. 100 J
• D. Data insufficient

Answer 1

The correct option is A Zero

the gravitational acts downward and from point A to point B the direction of motion is perpendicular to the direction of gravitational force.
we know
W$=F.Scos\theta$
here$\theta ={90}^0=cos{90}^0=0$
hence,The work done is zero.