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May 3, 2015

Homework Help: Physics

Posted by . on Sunday, September 19, 2010 at 10:34am.

How would I approach this problem? What formula would I use to answer each part? Thank you in advance for any guidance...


As part of the launch of the space shuttle, solid-rocket boosters (SRBs) first take it to an altitude of 45.0 km while they accelerate it to a speed of 4973 km/hr. The SRBs then separate from the shuttle and fall back to earth. Assume that the acceleration due to gravity is the same throughout their fall, and neglect air resistance.

1) How fast would the SRBs be moving (in km/hr) when they reached the earth's surface if they were traveling upward when they released the space shuttle?

2) How long (in mins.) after they began to fall would it take the SRBs to reach the ground?

3) While the space shuttle is being taken up, starting from rest, what is its acceleration (and the acceleration of the SRBs), in m/s^2?

4) While the space shuttle is being taken up, starting from rest, what is its acceleration (and the acceleration of the SRBs), in g's?

5) How long does it take to reach the 45 km altitude?

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