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A raw egg can be dropped from a third-fl oor window and land on a foam-rubber pad on the ground without breaking. If a 75.0-g egg is dropped from a window located 32.0 m above the ground and a foam-rubber pad that is 15.0 cm thick stops the egg in 9.20 ms, (a) by how much is the pad compressed?(b) What is the average force exertedon the egg after it strikes the pad?

Respuesta :

Answer:

N 204.13

Explanation:

Using equation of motion

v² = u² + 2as

u = 0 is the egg was dropped from rest.

v = 2 × 9.8 × 32 = √627.2 = 25.04 m/s

when the egg hit the foam-rubber, the acceleration can  be calculated with

a = change in velocity / change in time = - 25.04 / 0.0092 = -2721.74 m/s²

a) how much it is compressed

v² = u² + 2as

- u² = 2 (-2717.4) s

- 627.2 / -5443.48 = s

s = 0.1152 m = 11.52 cm

b) average force exerted on the egg = mΔv / Δt = 25.04 × 0.075 / 0.0092 = 204.13

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