1 J of work is done when a force of 0.01 N moves a body through a distanceof :

(i) 1 J of work is done when a force of 0.01 N moves a body through a distanceof :

a) 0.01 m (b) 0.1 m (c) 1 m (d) 10 m (e) 100 m.

Ans: – option (e).

 (ii) Work done is zero:

(a) When force and displacement are in the same direction.

(b) When force and displacement of the body are in opposite directions.

(c) When force acting on the body is perpendicular to the direction of the displacement of the body.

(d) When force makes an angle with displacement.

Ans: –  Option (c).

(iii) In which of the following situations work is done?

(a) A person is climbing up a stair case.

(b) A satellite revolving around the earth in closed circular orbit

(c) Two teams play a tug of war and both pull with equal force

(d) A person is standing with heavy load on his head.

Ans: – Option (a).

• Follow on Facebook page – Click Here
• Google News join in – Click Here