The acceleration in a body is due to :
Balanced force
Unbalanced force
Mass
Electrostatic force
If the mass of a chair is 5kg and the area of a cross section of each of its legs is 5cm2. Calculate the pressure exerted by the chair ?
98000 Pa
10000 Pa
24500 Pa
2500 Pa
Select the odd one out ?
bar
Pascal
Newton
mm Hg
The rear wheel of trucks are provided with double wheels. This is done to
Increase the force
Reduce the pressure
Increase the pressure
Decrease the force
What is the atmosphere compared with?
an ocean of water
a tightly packed envelope of air molecules
a tightly packed envelope of air
a balnket of air surrounding the Earth
Pressure exerted by a sharp needle on a surface is
More than the pressure exerted by a blunt needle
Less than the pressure exerted by a blunt needle
Equal to the pressure exerted by a blunt needle
None of these
Calculate the momentum of a toy bus of 0.01 kg moving with a velocity of 5 m/s ?
0.005 kg m/s
0.05 kg m/s
0.005 N s
0.5 kg m/s
A coin flicked across a table will stop, because :
It is heavy
No force is acting on it
Earth attracts the coin
Table exerts a frictional force
With the increase in the weight of an object the pressure
Increases
Decreases
Is not affected
The water supply from an overhead tank to the houses can be done becuse of which of the following ?
Difference in pressure
Gravitational force
Decrease of friction in pipes
Flow of liquid
