Force and Pressure CBSE

Is force a vector quantity

• Yes

• No

• Maybe

• None of the above

What are the broad categories of forces? (Multiple answers might be correct)

• Contact forces

• Gravitational force

• Non-contact force

• Electrostatic force

Which of these is/are not an example(s) of contact force? (Multiple answers might be correct)

• Normal force

• Muscular force

• Nuclear force

• Electromagnetic force

Which of these is/are not example(s) of non-contact force? (Multiple answers might be correct)

• Tension force

• Frictional force

• Spring force

• Gravitational force

The state of motion is described by (multiple answers might be correct)

• Speed

• Direction of motion

• Speed and direction of motion

• Velocity

Does a force always change the state of motion of an object?

• Yes

• No

What is the direction of the frictional force acting on an object?

• In the direction of motion

• Opposite to the direction of motion

• Perpendicular to the direction of motion

• In all directions

The S.I unit of pressure is

• Pascal (Pa)

• Bar (Bar)

• Standard atmosphere (atm)

• Barye (Ba)

Pressure exerted by the air around us is called

• Arial pressure

• Pressure due to air

• Atmospheric pressure

• Molecular pressure

When we fill a balloon with air, it grows. It may happen that the balloon explodes when filled with air. This is due to,

• Weight of the air inside the balloon is greater

• Weight of the air outside the balloon is greater

• Pressure inside the balloon is greater

• Pressure outside the balloon is greater