Question

1. Define force, Mention four difference between contact
on tour difference between contact and non-contact force. Wrile ul type
effect of force in the following situation.
a) A plastic scale prossed between two bricks.
b) A lump of dough from flour.
e) Applying of brakes to moving vehicle.
d) Straight drive of a cricket ball.
e Pulling of a chair.
2. Define pressure & its SI unit. Drive the expression for pressure.
Activity: - Prove that for a given thrust, pressure is inversely proportional to the area of contact using
a numerical data.
3. Define atmosphere pressure. Explain about the pressure exerted by liquids. Explain the different
sa applications of pressure.​

Answer 1

a pull or push is known as force.

four difference between contact and non contact force are:

1.contact force exerted by physical touching but non contact force is exerted without physical touching

2.contact force contain madhukar & frictional force but non contact force contain magnetic,electrostatic,and gravitational force

3.ex. of contact force is walking but ex. of non contact force is force exerted by earth

q.no.2. pressure is the force acting on a unit area of the obj.the S.I unit of pressure is newton per sec.

now I am not understanding your question but I hope it will also help you

Answer 2

Answer:

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