A fixed point about which a machine turns while doing mechanical work is called
Efforts
Fulcrum
Load
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
A device that changes the direction in which a force acts is called
A lever
A simple machine
An engine
A pulley
Which of the following stops you while sinking into the snow?
Skis
Boat
Lever
None
The turning effect produced by a force around a fulcrum is called
Mechanical advantage
Velocity ratio
Moment of the force
Momentum
A force can produce
A turning effect
An increase in size
An increase in volume
All the above
SI unit of pressure is
Nm
Nm2
N/m
N/m2
Aerosol cans used to contain a gas made from
Hydrogen
Methane
Chlorofluoro carbon
Ethane
The force that a machine exert on a given body to be moved is called
Effort
Bottle openers are the example of
Lever of I order
Lever of II order
Lever of III order
Simple machine
