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Gnoma [55]
3 years ago
15

4. How long would it take for a water balloon to fall 39 m if we dropped it starting from rest down an

Physics
1 answer:
Paraphin [41]3 years ago
8 0

Answer:

Around 2.8212 sec

Explanation:

Given the eqn x=1/2at^2+vot

your vo=0

39=1/2(-9.8)t^2

=7.95=t^2

=2.82sec

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Answer:

21.75 m

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t = Time taken for the car to slow down = 0.75 s

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v=u+at\\\Rightarrow a=\frac{v-u}{t}\\\Rightarrow a=\frac{8-50}{0.75}\\\Rightarrow a=-56\ m/s^2

Acceleration is -56 m/s²

v^2-u^2=2as\\\Rightarrow s=\frac{v^2-u^2}{2a}\\\Rightarrow s=\frac{8^2-50^2}{2\times -56}\\\Rightarrow s=21.75\ m

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