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During a heavy rain hailstones of averag...

During a heavy rain hailstones of average size 1.0 cm in diameter fall with an average speed of 20 m/s. Suppose 2000 hailstones strike every square meter of a `10mxx10m` roof perpendicularly in one second and assume that the hailstones do not rebound. Calculate the average force exerted by the falling hailstones on the roof. Density of a hailstone is `900 kg/m^3`

Text Solution

AI Generated Solution

To solve the problem, we need to calculate the average force exerted by the falling hailstones on the roof. We will do this step by step. ### Step 1: Calculate the radius of a hailstone Given the diameter of a hailstone is 1.0 cm, we can find the radius (r) as follows: \[ r = \frac{\text{diameter}}{2} = \frac{1.0 \, \text{cm}}{2} = 0.5 \, \text{cm} = 0.005 \, \text{m} \] ...
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Knowledge Check

  • A 3 kg ball strikes a heavy rigid wall with a speed of 10 m/s at an angle of 60^(@) . It gets reflected with the same speed and angle as shown in Fig. 15.3.11. It the ball is in contact with the wal for 0.20 s, what is the average force exerted on the ball by the wall ?

    A
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    B
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    C
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    D
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