Physics help?

Posted on 2015-11-14 06:21:00 in Physics by CANDY

In a novel from 1866 the author describes a spaceship that is blasted out of a cannon with a speed of about 1.29×104 m/s . The spaceship is approximately 274 m long, but part of it is packed with gunpowder, so it accelerates over a distance of only 213m.

What was the acceleration (in m/s2) experienced by the occupants of the spaceship during launch? (Though the novel’s author realized that the “travelers would … encounter a violent recoil,” he probably didn’t know that people generally lose consciousness if they experience accelerations greater than about 7g?70m/s2.)

When you see a traffic light turn red, you apply the brakes and stop with constant acceleration.If your initial speed was 12 m/s , what is your average speed during braking?

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