The Great Sandini is a 60.0-kg circus performer who is shot from a cannon (actua

Question

The Great Sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). You don’t find many men of his caliber, so you help him design a new gun. This new gun has a very large spring with a very small mass and a force constant of 1100 N/m that he will compress with a force of 4400 N. The inside of the gun barrel is coated with Teflon, so the average friction force will be only 40.0 N during the 4.00 m he moves in the barrel. At what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position

Part B

Below is a list of variables representing some of the relevant quantities in this problem. Which ones are known quantities?

Check all that apply

   y2, final height m, mass of body in motion v2, final speed v1, initial speed l, distance traveled between initial and final state k, force constant of spring y1, initial height F, magnitude of compressing force f, magnitude of friction

Explanation / Answer

k = 0.5 *4400^2/1100 - (40*4) - (60*9.8*2.5)

= 7170

speed = sqrt (2* 7170 / 60) = 15.46 m/s

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