1. A child is pulling a toy car along a horizontal surface :
(a) Name the forces acting on the toy car.
(b) Which of these forces performs positive work?
(c) Which of these forces performs negative work ?
Justify your answer.
1. A child is pulling a toy car along a horizontal surface :
(a) Name the forces acting on the toy car.
(b) Which of these forces performs positive work?
(c) Which of these forces performs negative work ?
Justify your answer.