science - force and pressure

Class 8 - Science

Force and Pressure

Q&A
Notes
Question:
A load suspended from a spring while its other end is on a hook fixed to a wall.
Answer:

Here, the suspended load exerts a force on the spring and pushes the spring downwards. As a result the spring gets stretched. Hence, its shape gets changed.

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Questions and Answers


Force and Pressure - Questions
1. Taking out paste from a toothpaste tube.
Answer
2. A load suspended from a spring while its other end is on a hook fixed to a wall.
Answer
3. An athlete making a high jump to clear the bar at a certain height.
Answer
4. Squeezing a piece of lemon between the fingers to extract its juice.
Answer
5. Name the forces acting on a plastic bucket containing water held above ground level in your hand. Discuss why the forces acting on the bucket do not bring a change in its state of motion.
Answer
6. An inflated balloon was pressed against a wall after it has been rubbed with a piece of synthetic cloth. It was found that the balloon sticks to the wall. What force might be esponsible for the attraction between the balloon and the wall?
Answer
7. Give two examples each of situations in which you push or pull to change the state of motion of objects.
Answer
8. A blacksmith hammers a hot piece of iron while making a tool. How does the force due to hammering affect the piece of iron?
Answer
9. Give two examples of situations in which applied force causes a change in the shape of an object.
Answer
10. A rocket has been fired upwards to launch a satellite in its orbit. Name the two forces acting on the rocket immediately after leaving the launching pad.
Answer
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