Does the force of gravity act on dust particles?

Tutorialspoint
Updated on 10-Oct-2022 13:29:04
Yes, the force of gravity act on dust particles too. According to the universal law of attraction, every small or large object exerts a force of attraction to other objects everywhere in the universe.

A gas filled balloon moves up. Is the upward force acting on it larger or smaller than the force of gravity?

Tutorialspoint
Updated on 10-Oct-2022 13:29:04
Yes, the upward force acting on the gas-filled balloon will be larger than the force of gravity that causes the gas-filled balloon to move upward.

Does the force of gravitation exist between two astronauts in space?

Tutorialspoint
Updated on 10-Oct-2022 13:29:04
Yes, the force of gravitation exists between two astronauts in space. According to the universal law of attraction, every small or large object exerts a force of attraction to other objects everywhere in the universe.

A chapatti maker is a machine which converts balls of dough into chapatties. What effect of force comes into play in this process?

Tutorialspoint
Updated on 10-Oct-2022 13:29:04
When a dough ball is pressed in a chapati maker, it becomes chapati due to pressure. Pressure is an effect of force per unit area.

Figure shows a man with a parachute. Name the force which is responsible for his downward motion. Will he come down with the same speed without the parachute?
"

Tutorialspoint
Updated on 10-Oct-2022 13:29:04
The gravitational force of the earth is responsible for the downward motion of the parachute that attracts objects. If the man comes down without a parachute then the speed will not be the same as the air friction will be very less which will cause the speed of the man to become very high.

A girl is pushing a box towards the East direction. In which direction should her friend push the box So that it moves faster in the same direction?

Tutorialspoint
Updated on 10-Oct-2022 13:29:03
Her friend should also push the box in the east direction so that as a result the magnitude of the force will increase and it will move faster in the same direction.

In the circuit shown in the figure, when the key is closed, the compass needle placed in the matchbox deflects. Name the force which causes this deflection.
"

Tutorialspoint
Updated on 10-Oct-2022 13:29:03
In the circuit shown in the figure, when the key is closed, the compass needle placed in the matchbox deflects. It is the electromagnetic force that causes this deflection. When current starts flowing trough the wire, the a magnetic field is created around the wire that cause the needle to deflect.

A ball of dough Is rolled into a flat chapatti. Name the force exerted to change the shape of the dough.

Tutorialspoint
Updated on 10-Oct-2022 13:29:02
When a dough ball is pressed with a roller, it becomes chapati due to pressure. Pressure is an effect of force per unit area.

Where do we apply a force while walking?

Tutorialspoint
Updated on 10-Oct-2022 13:29:02
We apply force over the ground in the backward direction. In reaction, the ground exerts the same force on our feet so that we can move forward.

A brick is kept in three different ways on a table as shown in the figure. The pressure exerted by the brick on the table will be
$(a)$. maximum in position A
$(b)$. maximum in position C
$(c)$. maximum in position B
$(d)$. equal in all cases
"

Tutorialspoint
Updated on 10-Oct-2022 13:29:01
The pressure is inversely proportional to the area on which the force is being exerted. When a brick is kept on a table in $(A)$ position, the area of contact will be minimum and the pressure exerted on the table will be maximum.So, option $(a)$ is correct.
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