Human arm is an example of
Lever of I order
Lever of II order
Lever of III order
Pulley
The moment of a 50 N force acting on a crowbar 0.5 m from the fulcrum is
250 Nm
25 Nm
2500 Nm
2.5 Nm
If the area where pressure is applied is smaller than the area where the pressure is decreased, then the strength of the force is
Increased
Decreased
Remains the same
First increased and then decreased.
A device that changes the direction in which a force acts is called
A lever
A simple machine
An engine
A pulley
SI unit of pressure is
Nm
Nm2
N/m
N/m2
Which of the following stops you while sinking into the snow?
Skis
Boat
Lever
None
If a cube has a weight of 500 N and the area of its side is 1 m2 the pressure it exerts on the ground is
500 N/m2
100 N/m2
50 N/m2
5 N/m2
Scissors is an example of
Lever of first order
Lever of second order
Lever of third order
Single fixed pulley
Aerosol cans used to contain a gas made from
Hydrogen
Methane
Chlorofluoro carbon
Ethane
A force can produce
A turning effect
An increase in size
An increase in volume
All the above
