Question

Write true (T) or false (F) against each statement:
1. You have to use a force to open a door, but no force is needed to close it.
2. Friction acts in a direction opposite to the motion.
3. Pushing a box mounted on wheels is an example of rolling friction.
4. The amount of sliding friction depends upon the weight of the object and the type of surface.
5. Lubricants change sliding friction into fluid friction.​

Answer 1

Answer:

1 false

2 true

3 false

4 true

5 true

Answer 2

Answer:

1 false

2 True

3 False

4 True

5 True