Question

Can you provide explanation of activity 12.2 for class 8 ncert science

Answer 1

please upload the picture coz I don't have book

Answer 2

The pencil cell covers different distances on different surfaces Repeat this activity by spreading a thin layer of sand over the table. Maintain the same slope throughout the activity.

Explanation:

The frictional force in fluids depends on :

1. The speed of the object with respect to the fluid
2. The shape of the object.
3. Nature of the fluid.

Activity 12.2:

The pencil cell covers different distances on different surfaces Repeat this activity by spreading a thin layer of sand over the table. Maintain the same slope throughout the activity.

Solution:

The distance covered by the pencil cell is different every time because of the different amounts of friction provided by different surfaces. The distance covered with a thin layer of sand is least, as this surface provides the maximum friction.