The unit of pressure is
Newton
Newton / metre
Pascal
Newton metre
To lift 1 kg you would like to have apply a force of about
1 N
10 N
100 N
1000 N
Materials used to reduce friction are called
Lubricants
Fuels
Catalyst
None of these
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
If you are on a swing and your friend pulls it in the direction opposite to its motion, the swing will
Move faster
Slow down
Not change
Which one of the following is used to reduce friction in rotating parts such as wheels rotates about a fixed shaft?
Grease
Ball bearings
Metal rods
Oil
The force that opposes the motion or tendency of motion between two surface in contact is called
Gravitational force
Tension
Force of friction
Magnetic force
The force acting normally on a surface is called
Gravity
Pressure
Thrust
Buoyant force
If you are cycling, and wind pushes you from behind, your speed will
Increase
Decrease
No change
Can not be predicted
Solids always exert pressure
Upwards
Downwards
At the centre
Can’t be predicted