To roll forward,there should be a friction between the wheels of a vehicle and
Engine
Air
Surface of the road
None of these
Force acting on unit area is called
Thrust
Pressure
Heat
Density
Which word is used to describe push or pull?
Force
Volume
The force acting normally on a surface is called
Gravity
Buoyant force
Which one of the following is correct?
Force cannot stop a moving object
Force cannot change the speed of a moving object
Force cannot change shape and size
Force can change the direction of motion
The contact force applied without touching it is called
Friction
Tension
Gravitational force
Weight of air exerted on unit area is called
Liquid pressure
Atmospheric pressure
Relative density
Density of an object
Is different in different place
Is greater in liquids
Is a constant
Is less in liquids
Dams are constructed with
Greater thickness at their top
Greater thickness at their bottom
Greater thickness at their centre
Same thickness from top to bottom
Forces that two bodies in contact apply on each other are called
Contact forces
Action - at - distance forces
Primary forces
