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4. In a class experiment to determine information about free-fall acceleration, a watermelon and a pumpkin are each set to fall from the back of the stands at your football stadium.

A. If the watermelon and the pumpkin are both dropped at the same time, which one will hit the ground first?



B. If it takes the watermelon 1 second to reach the ground when it is thrown downward at 10 m/s, how tall are the stands?

Respuesta :

A)

Answer: They will fall at the same time.

Explanation: This is a free fall equation. Free fall equations don't use other factors such as air resistance or wind.

B)

Answer: 15m

Explanation:

Given: Vi = 10m/s

           t = 1s

           a = 10m/s/s

The equation you need to use is d = Vit + 0.5at^2

d = Vi t + 0.5 a t^2

d = (10 m/s) (1 s) + 0.5 (10 m/s^2) (1 s)^2

d = (10 m) + 0.5 (10 m/s^2) (1 s)^2

d = (10 m) + (5 m/s^2) (1 s)^2

d = (10 m) + (5 m/s^2) (1 s^2)

d = (10 m) + (5 m)

d = 15 m

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