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formulajoe
Nov30-03, 08:31 PM
two people toss a raw egg in the egg toss. the force required to break the shell is 5N. the mass of the egg is 50g. estimate the maximum separation distance for the egg throwers. make whatever reasonable assumptions you need to about the launch angle and hand movement.

isnt an initial velocity needed for this problem?

gnome
Nov30-03, 08:35 PM
Estimate!

[:)]

Doc Al
Nov30-03, 08:39 PM
Originally posted by formulajoe
isnt an initial velocity needed for this problem?
That's what you've got to figure out. How fast can you toss that egg without breaking it?

gnome
Nov30-03, 08:41 PM
Suppose the tossers are very, very, very strong. Then what?

Doc Al
Nov30-03, 08:48 PM
Originally posted by gnome
Suppose the tossers are very, very, very strong. Then what?
Hint: How strong do they have to be to exert 5 N? [:D]

formulajoe
Nov30-03, 08:50 PM
okay, so i figured the acceleration for the egg to break to be 100 m/s^2.
im estimating the max distance to be 100 m.
im stuck. how do i figure in the 100 m/s^2? the acceleration in both directions is gonna be constant. 0 in the x direction and 9.8 in the y direction.
so if the tossers are very strong, they would throw the egg very hard. leaving a high initial velocity. but that doesnt help with how to get the acceleration so high.

Bystander
Nov30-03, 08:53 PM
How long is your arm?

formulajoe
Nov30-03, 08:55 PM
oooohhh, use centripetal acceleration to get initial velocity?

Doc Al
Nov30-03, 08:57 PM
Originally posted by formulajoe
okay, so i figured the acceleration for the egg to break to be 100 m/s^2.
im estimating the max distance to be 100 m.
The max distance is what you're supposed to be figuring out. Don't guess at that answer!

You figured out the max acceleration the egg can withstand. Now use Bystander's hint!

formulajoe
Nov30-03, 09:07 PM
using centripetal acc. i found the velocity to be 31.6 m/s with a radius(arm length) of .5 m. im assuming the launch angle to be 60 deg from the horizontal.
i have a feeling im way off though.
am i getting close?

MaxMoon
Nov30-03, 09:17 PM
You sound like you are from a town named after a fish.

MaxMoon
Nov30-03, 09:53 PM
Tom, are you still around. I looked at it like Work = mV^2 where V is the horizontal velocity. I don't know if I am right.

formulajoe
Nov30-03, 10:02 PM
uhhh how do you know my name?

MaxMoon
Nov30-03, 10:28 PM
Because you told me about this place at church today.