Question

1. what is force? what are the four effect main effect of force?
2.What is pressure? What does pressure depend upon.
3. Why is it difficult to cut with a blunt knife?
4. How does the pressure exerted by liquid change with depth? Explain with diagram. pls don't write that you don't know or anything like that if you wrote I will report you...​

Answer 1

Answer:

1.A force acting on an object causes the object to change its shape or size, to start moving, to stop moving, to accelerate or decelerate. When there's the interaction between two objects they exert a force on each other, these exerted forces are equal in size but opposite in direction.

Effects-

(a) a stationary object to move, (b) a moving object to change its speed, (c) a moving object to change its direction of motion, (d) an object to change in size and shape.

Answer 2

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1. A force acting on an object causes the object to change its shape or size, to start moving, to stop moving, to accelerate or decelerate. When there's the interaction between two objects they exert a force on each other, these exerted forces are equal in size but opposite in direction.

2. Pressure exerted by ideal gases in confined containers is due to the average number of collisions of gas molecules with the container walls per unit time. As such, pressure depends on the amount of gas (in number of molecules), its temperature, and the volume of the container.

3. Pressure is inversely proportional to force and area . So ,when pressure increases the Force and Area Decreases. Similarly , as in the case of blunt knife the Force and Area is increased , so the pressure decreases. That's why it is difficult to cut the vegetables with blunt knife with less amount of pressure.

4. The pressure exerted by a liquid is small just under the surface of the liquid. But as we go we deeper in a liquid the pressure of liquid increases.As the depth of liquid increases the weight of liquid column pushing down from above increases and hence the pressure also increases.