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Anonymous
Anonymous asked in Science & MathematicsPhysics · 2 months ago

In a 94 s interval, 642 hailstones strike a glass window of area 0.878 m2 at an angle 34◦?

to the

window surface. Each hailstone has a mass of

8 g and speed of 9.7 m/s.

If the collisions are elastic, find the average

force on the window.

Answer in units of N.

2. Find the pressure on the window.

Answer in units of N/m

2

1 Answer

Relevance
  • NCS
    Lv 7
    2 months ago

    Usually

    F = m * dv/dt

    but here

    F = dm/dt * v

    since the velocity is constant and it's the mass that changes

    F = 642*0.008kg/94s * 2*9.7m/s*sin34º = 0.593 N

    p = F/A = 0.675 Pa

    or 675 mPa

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