Pressure = \(\frac{Force}{Area}\)
Given, F = 200 N
For area, A = 20m²
\(p=\frac{200}{20}=10\) N/m² or 10Pa

The name of force responsible for the downward motion of the parachute is force of gravity. No, because the air friction will become less.

The forces acting on a plastic bucket are gravitational force and muscular force. These forces not bring a change in its state of motion because being equal and opposite in magnitude, the effect of net force on bucket becomes zero.

The two examples are as follows:
(i) We push the door to open it.
(ii) We pull a drawer to open it.

When a person swims freestyle, he is pulling himself forward in the water.

The interacting objects in this case are: earth and fruit. Earth applies force of gravity on fruit towards its centre. So, fruit fells down.

Her friend should push the box towards East direction, so that it will start moving more fast towards East because the magnitude of force increases.

The shape of dough is changed due to muscular force applied by the hand.

Forces can be of two types:
(i) Contact forces.
(ii) Non-contact forces.
(i) Contact forces : The forces that come into play when two objects come in contact with each other.
(a) Muscular force: The force which is exerted due to action of muscles is known as the muscular force. e.g., running, bending, walking etc.
(b) Frictional Force: The force responsible for changing the state of motion of an object. Equal and opposite forces are being exerted on an object when its surface comes in contact with other surface. e.g., a car or scooter comes to rest.
(ii) Non-contact forces: The forces that can be exerted from a distance without establishing a contact are called the non-contact forces.
(a) Magnetic forces : Force exerted by a magnet on another magnet or magnetic substances like iron is called magnetic force. e.g., Car sticking to an electromagnet.
(b) Electrostatic force : Force exerted by a charged body on another charged body or uncharged body is called electrostatic force. e.g., If we rub a comb with hair and bring it near some small bits of paper it attracts the bits of paper towards itself. This is electrostatic force.
(c) Force of gravity : The earth pulls every object towards its centre. The force exerted by the earth is called the force of gravity.

(a) Sumit applied more pressure on his palm by baring the maximum load of his body on small  area of palm while Amit applied less pressure on his palm by baring the same load on larger area of palm.
(b) Amit have the presence of mind and he thought of an excellent idea about pressure on the body part.

Pressure at depth due to liquid column depends upon
(i) gravitational acceleration (g)
(ii) density of liquid
(iii) height of liquid.
And in this case, g and density are same, so only thing that can change pressure is height. So, the order of pressure exerted by the fluid A, B,C and D at the base is given by P_o > P_a > P_A > P_C

As, we know that the atmospheric pressure exerted by the air on the object below it. This pressure vary from place to place and from time to time due to variation in temperature. Even, the density of air decreases with the increase in temperature. So, as a result, the atmospheric pressure also decreases. The atmospheric pressure at a place is because of the weight of air above it. So, if we go higher above the earth surface, the atmospheric pressure decreases, thus at mountain top the pressure is less. The atmospheric pressure at sea level is considered as standard pressure.