Question

2.
friction is less than sliding friction
3. The frictional force on an object moving
through air is also known as
4 Honey exerts drag on a spoon than
water does
5. The spikes on the soles of athletes' shoes
friction with the ground.
6. Lubricants friction between the
rubbing surfaces.
7. Ball bearings reduce friction by replacing
sliding friction with
friction.
8. A shape that is slightly rounded in front
and narrower at the back is called a
shape.
C. Say whether the statements are true
or false.
1. Friction is a contact force.
2. Friction is greater when there are fewer
irregularities on a surface.
3. Friction is greater when an object is
stationary on a surface than when it is
moving over it.
4. Rolling friction is less than static friction.
5. Energy is wasted in overcoming friction.
6. It is desirable to increase friction in the
brakes of vehicles.
7. Streamlining a shape reduces drag due to air
or water.
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Answer 1

Answer:

2.

Rolling friction is less than sliding friction

3.

Drag is the frictional force on an object moving

force on an object movingthrough air.

4.

Honey exerts drag on a spoon than

Honey exerts drag on a spoon thanwater does on it.

5.

The spikes on the soles of athletes' shoes increase friction with the ground.

6.

Lubricants reduce friction between rubbing surfaces.

7.

Ball bearings reduce friction by replacing

Ball bearings reduce friction by replacingsliding friction with rolling friction.

8.

Streamlined.

C.

1. True

2. False

3. True

4. True

5. True

6. True

7. True