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A bolt falls off an airplane high above the ground. How far does the bolt have to fall before its speed reaches 100m/s (about 200 miles per hour)? You should ignore air friction in your calculation.

Sagot :

We can use the equation vf (the final velocity) =vi (the initial velocity) +at (aceleration times time)

We know the final velocity 100m/s, the initial velocity 0, and the acceleration (gravity) 9.8m/s^2. So, 100=0+9.8t. t=100/9.8
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