Question

EXERCISES
A. Tick (1) the correct answer:
1. Work is said to be done:
(a) when an object moves from rest
(b) when an object stops moving
(c) when an object changes its direction of movement
(d) in all the above cases
2. How can we increase the speed of doing work?
(a) By applying more and more force (b) By working hard
(C) By using a machine
(d) By increasing pressure
3. Big-sized stones can be lifted by using:
(a) an inclined plane
(b) a wheel
(c) a wedge
(d) a lever
4. An example of a wedge is:
(a) jack
(b) nail
(6)​

Answer 1

Answer:

1.when a object stops moving

2.by increasing pressure

3.a wheel

4.nail

.