Class 8 force and Pressure Test

The SI unit of force is (a)  

The (a)   force can be used to gather iron pins scattered on the floor.

If two forces applied to an object are equal and act in opposite directions, the net force acting on the object will be (a)  

Which one among the following is not a type of non-contact forces?

• Muscular force

• Magnetic force

• Gravitational force

• Electrostatic force

The pressure exerted by a liquid (a)   with depth.

A drinking straw works on the existence of (a)   pressure.

Atmospheric pressure (a)   with increasing height.

The SI unit of pressure is (a)  

A force F acts on 4 different objects, having areas given below. In which case, the pressure exerted will be maximum?

• 20m²

• 50m²

• 10m²

• 100m²

A pressure of 10kPa acts on an area of 0.3 m². The force acting on the area will be

• 3000 N

• 30 N

• 3 N

• 300 N