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anonymous
 5 years ago
On the moon the acceleration due to gravity is 1.6 metres per second squared
(approximately
1
6
th of the value on earth). Standing on top of a ladder, 5 metres up,
the astronaut throws a ball up vertically into the air with velocity 2m/s. How long
does it take to reach the ground? How long would it take to reach the ground if the
same experiment were done on earth?
anonymous
 5 years ago
On the moon the acceleration due to gravity is 1.6 metres per second squared (approximately 1 6 th of the value on earth). Standing on top of a ladder, 5 metres up, the astronaut throws a ball up vertically into the air with velocity 2m/s. How long does it take to reach the ground? How long would it take to reach the ground if the same experiment were done on earth?

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I have an answer, but I am not entirely sure if it's correct or not. I'll write it down anyway.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[\Delta x=v_i t+{1 \over 2}at^2\], where delta x=5 (the change in the position), v_i=2m/s and a=1.6m/s^2. Substituting them in the equation gives: \[5=2t+{1 \over 2}(1.6)t^2 \implies 0.8t^22t5=0\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Solve the quadratic equation for t, you get one positive value for t. That's t=4.05 sec

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Do you have the answer, or choices?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i only got to having to use the quadratic equation, i didn't realise i had to use the quadratic equation

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0You can just do it in your calculator.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0yeah i just had to recognise that cause i think i'm meant to show working

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0the quadratic formula is your personal picture yo :P

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0yeah, cause i m having maximum trouble with it :)
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