Advertisements
Advertisements
Question
A boy weighing 60 kgf stands on platform of dimensions 2.5 cm x 0.5 cm. What pressure in pascal does he exert?
Solution
Force = Thrust = Weight = 60 kgf
= 60 x 10 = 600 N
Area of platform = 2.5 cm x 0.5 cm
`=2.5/100m xx0.5/100 m = 25/1000xx5/1000`
=`1/40xx1/200=1/8000m^2`
Pressure P = `F/ A = ( 600N)/((1m^2)/8000)`
`= (600 xx 8000)/1` =
= 4800000
=`4800000/10xx10`
= 4.8 × 106 Pa
APPEARS IN
RELATED QUESTIONS
The pressure and thrust are related as
When does a man exert more pressure on the floor: while standing or while walking?
It is easier to cut with a sharp knife than with a blunt one. Explain.
A normal force of 200 N acts on an area of 0.02 m2. Find the pressure in pascal.
Figure shows a brick of weight 2 kgf and dimensions 20 cm x 10 cm × 5 cm placed in three different positions on the ground. Find the pressure exerted by the brick in each case.
What is thrust?
Give reasons why:
a single nail pricking the body is painful when compared to lying on a bed of nails.
Fluids in general are ______.
The pressure in mines is ______ than the sea level.
Assertion (A): Air gets thinner with increasing altitude.
Reason (R): The atmospheric pressure increases as we go up in mountains.
