Question

a mass of 10 kg is at a point a on the table it is moved to a point B If a line joining a and b is horizontal what is the work done on the object by the gravitational force explain your answer ​

Answer 1

Answer:

0

Explanation:

Note:

• since, horizontal work is done on the object, therefore angle between force of gravity and displacement = 90°
• Cos 90° = 0

W = Fs cosΦ

since, cosΦ = 0

W = 0

Answer 2

Answer:

${\tt{\red{\bold{\huge{Question}}}}}$

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? Explain your answer.

${\tt{\green{\bold{\huge{Answer}}}}}$

The work done is zero. This is because the gravitational force and displacement are perpendicular to each other.