Force and Pressure

When we kick the football, what is the type of force?

• electrical force

• magnetic force

• mechanical force

• electrostatic force

When a ball is dropped, its speed increases. Name the force responsible for this.

• muscular force

• gravitational force

• contact force

• none of the above

A plastic comb when rubbed on dry hair attracts bits of paper. Which force is involved here?

• muscular force

• gravitational force

• electrostatic force

• tension force

Name the force which always opposes motion.

• tension force

• muscular force

• gravitational force

• frictional force

What is the net force?

• 2N

• 10N

• 3N

• 8N

When a garden pipe bursts, the water comes out like a fountain. This is due to:

• liquid pressure

• atmospheric pressure

• water is a fluid

• none of these

If a vacuum is created between two hemispheres, it is difficult to separate them. This is due to:

• vacuum pressure

• atmospheric pressure

• liquid pressure

• none of these

The weight of a boy is 400N. Find the mass of the boy.

• 4 kg

• 40 g

• 400 kg

• 40 kg

Why do tractors have large and wide tyres?

• Pressure on the ground will be less

• Pressure on the ground will be more

• Pressure on the ground will be equal

• none of the above

A box of mass 5 kg is placed on a table. If the length and breadth of the box is 5 cm and 4 cm respectively. Find the pressure exerted on the table.

• 20 kPa

• 25 kPa

• 5 kPa

• 50 kPa