Q.1. Give one practical application of magnetic force.
Q.2. Explain why snowshoes stop you from sinking into the snow.
Q.3. Which force can be used to gather iron pins scattered on the floor?
Q.4. Write one example where force changes the speed of a moving object.
Q.5. What is meant by a non-contact force? Give an example.
Q.6. What is meant by atmospheric pressure?
Q.7. Why do the shape and size of balloons change when filled with air or water?
Q.8. What is muscular force? Give one example.
Q.9. What is meant by gravitational force (or force of gravity)? Give one example.
Q.10. Explain why the walls of a dam are thicker near the bottom than at the top.
Q.11. Explain why the frictional force is said to be a contact force.
Q.12. Explain why the tip of a sewing needle is sharp.
Q.13. What do you understand by the state of Motion?
Q.14. Why does a plastic comb rub with dry hair attract tiny pieces of paper?
Q.15. Explain why, when a person stands on a cushion, the depression is much more than when he lies down on it.
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1. What is the difference between force and pressure? |
2. How is pressure calculated? |
3. Why is pressure important in everyday life? |
4. What units are used to measure force and pressure? |
5. How does altitude affect atmospheric pressure? |
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