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patriot [66]
3 years ago
15

If there were no air resistance, how long would it take a free-falling skydiver to fall from a plane at 3500 m to an altitude of

400 m , where she will pull her ripcord?
Physics
1 answer:
xxMikexx [17]3 years ago
7 0

By equation of motion we have S = ut + 0.5 at^{2}

Where u = Initail velocity, S= dispalcement, t = time taken, a = acceleration

Here S = 3500-400 = 3100m, u = 0m/s, g = 9.8 m/s^{2}

So, 3100 = 0+0.5*9.8*t^{2}

       t^{2} = 3100/4.9

       t = \sqrt{3100/4.9}

      t = 25.15 seconds

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Complete question:

Resistor is made of a very thin metal wire that is 3.2 mm long, with a diameter of 0.4 mm. What is the electric field inside this metal resistor? If the potential difference due to electric field between the two ends of the resistor is 10 V.

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