Question

please answer my question.
​

Answer 1

Explanation:

Positive work done – The work done is said to be positive when force and displacement are in the same direction. Hence, work is positive. Zero work – the work done is said to be zero when force and displacement are perpendicular to each other.Work is said to be done when a force applied to an object moves that object.

Positive work

When force and displacement are in the same direction, the work performed on an object is said to be positive work.

Example: When a body moves on the horizontal surface, force and displacement act in the forward path. The work is done in this case known as Positive work.

Negative work

Negative work is performed if the displacement is opposite to the direction of the Force applied.

Example: Work was done the gravity on a rocket going perpendicular upwards.

Zero work

When

Answer 2

Answer:

a)The work done is said to be positive when force and displacement are in same direction.

b)The work done is said to be zero when the displacement of a body is zero or perpendicular to the distance of force applied.