Question

two example of positive work negative work and zero work ​

Answer 1

Explanation:

for positive work- 1)when a spring is stretched, work done by the stretching force is positive. 2)when work done by the gravity on a body falling freely is positive. for negative work -1) when brakes are applied on a moving vehicle 2) when a body is moved over a rough horizontal surface. for zero work -1) movement of simple pendulum clock. 2( when a body tied to one end of a string is rotated