A boy of mass 62 kg is standing on skis kept on snow. Mass of each ski is 1 kg and its base area is $800 c m^{2}$ . What pressure is getting exerted on the snow?
[Take g = 10 m/s]

2000 Pa

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8000 Pa

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16000 Pa

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4000 Pa

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Solution

The correct option is D 4000 Pa
We know that $Pressure = \frac{T h r u s t}{A r e a}$
Weight of the boy $= 62 \times 10$
$= 620 N$
Weight of skies $= 2 \times 1 \times 10$
$= 20 N$
Total thrust = $620 + 20 = 640 N$
Pressure = $\frac{640 N}{2 \times 800 c m^{2}}$
Pressure = $\frac{640 N}{1600 \times 10^{- 4} m^{2}}$
Pressure = $\frac{640}{16} \times 10^{2}$
Pressure = 4000 Pa

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A boy of mass 62 kg is standing on skis kept on snow. Mass of each ski is 1 kg and its base area is 800 cm2. What pressure is getting exerted on the snow? [Take g = 10 m/s]

The correct option is D 4000 PaWe know that Pressure=ThrustArea Weight of the boy =62×10 =620 N Weight of skies =2×1×10 =20 N Total thrust = 620+20=640 N Pressure = 640 N2×800 cm2 Pressure =640 N1600×10−4m2 Pressure = 64016×102 Pressure = 4000 Pa

A boy of mass 62 kg is standing on skis kept on snow. Mass of each ski is 1 kg and its base area is $800 c m^{2}$ . What pressure is getting exerted on the snow?
[Take g = 10 m/s]