A quantity which has only magnitude is
Scalar quantity
Vector quantity
Fundamental quantity
Derived quantity
The energy which can not be replaced when once used up is called
Renewable energy sources
Non-renewable energy sources
Wind energy
Solar energy
A device which can turn about a point is called
Beam
Lever
Load
Effort
The unit of moment of force is
N
N m
N m-1
N m2
Which of the following is needed to enable people, computers, machines and other devices to do work ?
Work done
Energy
Energy transfer
Power
The unit of pressure is
Newton
Joule
Pascal
Hertz
The energy possessed by a body by virtue of its position is called
Kinetic energy
Potential energy
Chemical energy
Food and fuels like oil, gas, coal etc are concentrated stores of
Electrical energy
The force acting on unit area is called
Pressure
Friction
The source of most liquid and gaseous fuels is
Petrol
Natural gas
Crude oil
Paraffin
