The Universe

Season 2 Episode 17

Gravity

0
Aired Tuesday 9:00 PM Apr 22, 2008 on The History Channel
8.3
out of 10
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10 votes
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Episode Summary

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Explore how science and humanity discovered, overcame and utilized gravity.

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SUBMIT REVIEW
  • what the what? this show is horrible

    0.5
    hold on a sec. this doc is actually telling people that objects on earth, no matter what their mass is, fall in synchronicity due to gravity. They actually show a guy on a roller coaster that falls down freely, let go of a tennis ball to prove this. Interestingly enough the tennis ball keeps up with the fall of the carts but not for long. Why??? Because it is not entirely true. I have had people argue with me on this matter because they watched this stupid show. Yes, gravity does accelerates objects with mass at a constant rate, but only in a vacuum. Remember the test on the moon with a feather and hammer... vacuum!!!! There are forces such as buoyancy and air resistance that slow objects down so that they don't actually all hit the ground at the same time. If you follow the logic of this stupid show, then a bowling ball and a boat would sink at the same rate, a bowling ball and a man with a parachute deployed would hit the ground at the same time. Well, aren't all those people that jump out of airplanes for fun stupid. Well, maybe a little anyway. I would love to meet the brainiacs behind this episode and drop them out of an airplane while holding a tennis ball.moreless

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    • Narrator: It is both mighty and meek. Humanity's quest is to harness its power and escape its bonds. It creates and breaks the stars, the planets, the galaxies and directs their cosmic roller coaster ride. Without it life as we know it would end. It is the magnificent and mystifying force that rules the universe: Gravity.

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