A charged comb picks up bits of paper because of:
Magnetic force
Gravitational force
Elastic force
Electrostatic force
Dams are constructed with greater thickness in their bases due to:
Higher pressure
Lesser pressure
Greater force at the bottom
Lesser force at the bottom.
In which of the following cases is friction a disadvantage to us ?
Running
Breaking
Writing with pencil
Parts of a machine rubbing with each other
The force that opposes the motion or tendency of motion between two surface in contact is called:
Surface tension
Force of friction
To lift 1 kg you would like to have apply a force of about:
1N
10N
100N
1000N
What is the SI unit of force?
Newton
Volt
Hertz
Ampere
The force exerted by a magnet is called:
Moment
The mutual force of attraction between two bodies because of their masses is called:
Frictional force
What is the unit of pressure?
Pascal
Kelvin
The force with which the earth attracts a body is called the body's:
Weight
Length
Volume
Area
