Page 127 - Science Class 08

F. Short answer ques ons.
1. Write the effects of force.

2. Describe mechanical force.
3. Write any four advantages of fric on.
4. How can we reduce the effect of fric on?

5. Write any three ways of increasing fric on.
6. What advantage can we take by magne c force?
7. How can we measure the pressure exerted by liquid?
8. How can we measure atmospheric pressure?

G. Long answer ques ons.
1. What do you mean by force? Explain.
2. What are the advantages of fric on? What will happen if there will be no fric on? Explain.

3. Explain atmospheric pressure.
4. Write an ac vity to show that atmosphere experts a large pressure.
5. What is the difference between gravita onal and magne c force?

Project ActivityActivityActivity
Project
Project
Project Activity
A. Make a presenta on showing the gravita onal force is important on the earth.
B. Draw a labelled diagram of manometer in the space provided below.

HO
HO
HOTSTSTS
HOTS
A. When you press a rubber sucker on a rough surface, it does not s ck to the surface. Why?
B. Gravita onal force exists between you and a building. Why are you not pulled towards the
building?

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