# How would u do this Physics Problem?

Discussion in 'Off Topic' started by Aimster, Oct 20, 2003.

1. ### Aimster Lifer

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You accidentally throw your car keys horizontally at 8.0 m/s from a cliff 64m high. How far from the base of the cliff should you look for the keys?

How do u do it?

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2. ### notfred Lifer

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Find how long it takes something to fall 64m.

Multiply that number (in seconds) by 8.

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3. ### Aimster Lifer

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law of gravitation?

#3

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Correct.

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5. ### Triumph Lifer

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you use kinematic equations of motion.

have you written out all of your knowns and unknowns? have you written out your equations? there's only 5 of them that you have to work with. learn how to use two equations and two unknowns.

i know someone else is going to go and solve it for you, but i really wish they wouldn't. that's not the way to learn how to solve problems yourself.

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6. ### ElFenix Super Moderator and Elite Member Super Moderator

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64 is the 2nd derivative of the acceleration iirc

#6

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What?

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8. ### Aimster Lifer

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Okay thanks guys I got it!

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9. ### Triumph Lifer

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Yes, because we gave you the answer. Could you do it on a test? Could you do it if the keys were thrown at a 32 degree angle? Could you do it if you were throwing the keys up to a cliff 64 m high?

I'm not trying to attack you, I just don't like how people on here are so ready to just give up the answer, instead of trying to help you learn to do it yourself.

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10. ### toekramp Diamond Member

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i like green eggs and ham.

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11. ### Cyberian Diamond Member

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Yeah, Aimster!

Someday in real life you are going to accidentally throw your car keys horizontally at 8.0 m/s from a cliff 64m high and you won't have the faintest idea where to look for them and you'll probably starve in the desert.

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12. ### thedarkwolf Diamond Member

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I get new locks for my house and have the dealership make me new keys

#12

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