Question

Give an example in which both positive and negative work are done together by two different forces​

Answer 1

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

a)Examples of positive work done

1. Kicking a football          

2. Moving a chair

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

b)Examples of Negative Work done

1. Someone pushes you

2. You are pulled from behind when you try to move front

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.

c)Examples of positive work done

1.For a body moving in a circular path, the centripetal force and displacement are perpendicular to each other. So the work done by centripetal force is zero.

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