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
Which mechanism is used in brake system of a car?
Hover craft
Hydraulic
Lever
None of these
Which of the following stops you while sinking into the snow?
Skis
Boat
None
In liquids, pressure is increases with
Area
Width
Length
Depth
A device that changes the direction in which a force acts is called
A lever
A simple machine
An engine
A pulley
Aerosol cans used to contain a gas made from
Hydrogen
Methane
Chlorofluoro carbon
Ethane
As area increases, pressure
Remains the same
Decreases
Increases
Cannot Predict
A force can produce
A turning effect
An increase in size
An increase in volume
All the above
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
First increased and then decreased.
A fixed point about which a machine turns while doing mechanical work is called
Efforts
Fulcrum
Load
Pulley
