# physics

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A rocket is launched straight up with constant acceleration. Four seconds after liftoff, a bolt falls off the side of the rocket. The bolt hits the ground 6.40 s later.

What is the rocket's acceleration?

• physics -

Figure the vertical velocity and height the bolt when it breaks off, in terms of a.

Then, using that hi, and vi, you can figure a from that equation.

hf=hi+Vi*time-1/2 g time^2 you know Vi, Hi in terms of a, and hf=0

There is a little algebra in this.

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