Question

Activity to show that friction depends on nature of surface

Answer 1

Answer:

Explanation:

Activity:

Aim: To show that Friction depends on Nature of Surface.

Theory: As nature of surface changes, Friction varies accordingly.

Materials: A box(Pencil Box sort of thing), a Cloth piece,  A rectangular glass(same as cardboard size), a supporting cardboard

Procedure:

1. First neatly spread the cloth over the cardboard  and make it inclined using a tall thing.
2. Now when all arrangements are done , swiftly allow the box to slide on the settings.
3. Now similarly take the glass and place it inclined on the same with no inclined angle change
4. Now slide the box on the glass.
5. Remember not to give any extra effort to any of cloth or glass.

Observations:

• The box on the glass swiftly goes down
• The cloth piece one takes time
• This happened because cloth piece exerted more friction as compared to glass which is sleek and has less friction production capability.

Precautions:

• Hold the glass piece with utmost care
• The activity must be done under adult's supervision.
• Do not exert pressure on cloth piece if the box does not move which shows that cloth piece produces more friction.

Answer 2

Answer:

1. Take a sheet of paper, a handkerchief, a hand towel, a rectangular piece of glass and wood as surface and pencil.

2. Now roll the pencil on each surface.

3. Number the surface in the order in which the pencil rolled easily on them. Also, mention, whether the surface is rough or smooth.