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    Diracs delta equation - general interpretation

    Im really just searching for a general explanation! If you are solving a pretty standard left hand side differential equation, but a diracs delta function on the right hand side. I am abit confused about how to interpret this. If this is the case for the right hand side: r(t) = Diracs (t)...
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    Projectile motion - ball in circular motion

    Yes well I have been trying too solve this without thinking about the table. But I was thinking of something, since I know that the hypotenuse is 0.5m. If you imagine a right-angled triangle, one side that illustrates the difference in height and the other traveled in x-direction. But still I...
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    Projectile motion - ball in circular motion

    Homework Statement Okey, so the problem started with a ball in circular motion on a table (xy-plane, seen from above). Eventually the rope that held the ball snapped and the ball continued on (no friction/air resistance) with constant velocity in x-direction. Gravity working in negative...
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    Tangential acceleration - radial acceleration

    Hi, I got a ball in a circualar motion on a frictionless table and in a uniform circle. I need to calculate the tangential acceleration and radial acceleration. What I know: Radius: 0.4m Tangential velocity: 0.50m/s^-1 (constant) Are theese formulas right for this problem? Radial...
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    Uniform circular motion - 2 dimensional - 2 forces

    My mistake, you are absolutely right! But now that is solved, the rest of my thinking should be okey?
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    Uniform circular motion - 2 dimensional - 2 forces

    Well F = (m*v2) / r F = (1*4^2) / 4 = 4 And the force is pointing towards the center.
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    Moment of inertia - displaced axis

    Hi, I need some help, I have a system with 3 cylinders (I got the center of mass for the system). Now I need to calculate the moment of inertia for the system. I have tried to find some examples or general information, but they all show when the axis either is centered within the object or...
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    Uniform circular motion - 2 dimensional - 2 forces

    Okey, so I have calculated that the net force for the circular motion is 4N... -4(j) if we are at angle zero position. Now correct me if I am wrong on this: When the angle is 0, that is when the ball is on the right side of origin on the x-axis. The force is then pointing too origin and that...
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    Uniform circular motion - 2 dimensional - 2 forces

    An object moves in the xy-plane in a uniform circular motion. We know that there is two forces action upon the object. One we have that is F1, F2 is unknown. Both vectors speed : 4m/s radius : 4m mass : 1kg F1 : 10 i N (i as in x-direction vector) F2 : ? (bound to be in the xy-plane) How do I...