Respuesta :
Answer:
Pressure in N/cm² = 66.46 N/cm²
Explanation:
Total weight of the man and the chair is 68.8 + 5 = 73.8 kg
But the weight is evenly distributed to the legs of the chair with four legs.
Each tension or load on a leg of the chair is 73.8/4= 18.45 kg
The load on each chair is 18.45*10 = 184.5 N.
Pressure = load/area
Area = πr²
area = π*0.94²
Area = 2.776 cm²
pressure = load/ area
Pressure = 184.5/2.776
Pressure = 66.46 N/cm²
Answer:
P = 651353.67 Pa
Explanation:
The mass of the man = 68.8 kg
Mass of the chair = 5 kg
Total mass = 68.8 + 5 = 73.5 kg
Since both the chair and the man have 2 legs each, the total number of legs = 4
The force applied by each of the legs, F = ma
F = (73.5) * 9.8/4
F = 180.81 N
The pressure exerted by each of the legs, P = F/A
Radius, r = 0.94 cm = 0.0094 m
Area, A = πr²
A = π(0.0094)²
A = 0.000278 m²
P = 180.81/0.000278
P = 651353.67 Pa
