A model weighing 45 kg is standing on a pencil heel each having an area of cross-section of 2 cm square. Calculate the pressure exerted on the floor.(Acceleration due to gravity-10m/s²)
Answers
Given : A model weighing 45 kg is standing on a pencil heel each having an area of cross- section of 2 cm square
To Find : the pressure exerted on the floor.
Solution:
Pressure = Force / Area
Force = ma
m = mass = 45 kg
a = g = 10 m/s²
Force = 45 * 10 = 450 N
standing on a pencil heel each having an area of cross- section of 2 cm square
Area = 2 * 2 cm² = 4cm²
= 4 * 10⁻⁴ m²
Pressure = 450 / (4 * 10⁻⁴)
= 112.5 * 10⁴ N/m²
= 1.125 * 10⁶ N/m²
= 1125 kN/m²
or 1.125 MPa
MPa = Mega Pascal
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Answer:
Pressure = Force / Area
Force = ma
m = mass= 45 kg
a = g = 10 m/s²
Force = 45* 10 = 450 N
standing on a pencil heel each having an area of cross-section of 2 cm square
Area = 2 * 2 cm² = 4cm² = 4*10-4 m²
Pressure = 450 / (4*10-4)
= 112.5 * 104 N/m²
= 1.125 * 106 N/m²
= 1125 kN/m²
or 1.125 MPa.