Question

define positive, negative and zero work​

Answer 1

Answer:

Explanation:

1. When the force acting on the body and its displacement are in same direction, positive work is done.

2. When the force acting on the body and its displacement are in opposite direction, negative work is done.

3. When the force is acting on the body but its displacement is 0, work done is 0.

Answer 2

Answer:

POSITIVE WORK :the work done on an object is said to be positive work when force and displacement are in same direction.

example: When an object moves on horizontal surface,force and displacement acts in forward direction. So,work done is positive.

NEGATIVE WORK:The work done is said to be negative work when force and displacement are in opposite direction.

example: When an object is thrown upwards,the force CTS in downward direction whereas displacement acts in upward direction.

ZERO WORK:The work done is said to be zero work when force and displacement are perpendicular to each other or when either force or displacement is zero.

example: When we hold an object and walk,the force acts in downward direction whereas displacement acts in forward direction.