Recent content by failedphysics

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    Quick question (not homework) just wondering

    What do you mean? kinematic equation? You mean the Ek =1/2mv^2 and 1/2mv0^2 and the Ep=mgh stuff? Couldn't figure out how to type the mv thingy with the start speed v0 and also put it as ^ Actually I didn't pay attention in the first physics I had so I am very bad on these formulas. Never...
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    Quick question (not homework) just wondering

    If I throw a ball vertically in the air and catch it again at the exact same height after 3.6 seconds. (looking away from air resistance) So the question is: 1. How big is the starting speed? (v0) And how far in the air would the ball go? 2. If we were not to catch the ball it would've hit the...
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    Something I don't understand. [Kinetic & potential energy]

    I really don't understand this example: A feather or spring or whatever it's called got the stiffness 29.5 N/m. It is lying inside a horizontal tube (feather cannon). The feather /spring is connected in the very end of the tube. The feather / pring is as "long" as the tube if it's not being...
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