Three swimmers can swim equally fast relative to the water. They have a race to see who can swim across a flowing river in the l
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Answer:
(a). The pressure is 14.76 psi.
(b). The pressure is 15.59 psi.
(c). The pressure is 15.68 psi.
All answer are reasonable.
Explanation:
Given that,
Speed v₁= 60 mph
Speed v₂ = 225 mph
Speed v₃ = 235 mph
(a). We need to calculate the maximum pressure on his hand
Using equation of pressure
there, no vertical movement
So, on neglect of height term
Where, P= atmospheric pressure
= air density
v = speed
Put the value in the equation
(b). Speed v₂ = 225 mph
We need to calculate the maximum pressure on his hand
Using equation of pressure
Put the value in the equation
(c). Speed v₃ = 235 mph
We need to calculate the maximum pressure on his hand
Using equation of pressure
Put the value in the equation
According to bernoulli's equation,
If the car increases the velocity the the pressure on the surface of the driver's hand increases.
The pressure from P₁ to P₃ are all near the value of one atmosphere.
So, the pressure difference of one atmosphere is not enough to break the driver's hand.
Hence, (a). The pressure is 14.76 psi.
(b). The pressure is 15.59 psi.
(c). The pressure is 15.68 psi.
All answer are reasonable.