Recent content by AltruistKnight

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    Bullet hits cylinder angular speed

    Angular Velocity After Bullet Hits Cylinder Homework Statement A 11.0g bullet is fired at 378.1m/s into a solid disk of mass 19.1kg and a radius 0.250m. The disk is initially at rest and is mounted on fixed vertical axis that runs through it's center of mass. The line of motion of the...
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    Sliding Block Attached to a Spring

    Homework Statement A block with mass 2.90kg is attached as shown to a spring with a force constant of 492.0N/m. The coefficient of kinetic friction between the block and the surface on which it slides is 0.170. The block is pulled 5.30cm to the right of its equilibrium position and then...
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    Bike Approaching Stopped Truck at Traffic Lights

    Ah, I see. -7.5 since the total distance the bike travels will be 7.5 more than that the truck traveled when they attain the same overall position. Thanks a lot, this problem was giving me a lot of grief.
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    Bike Approaching Stopped Truck at Traffic Lights

    How would the 7.5 end up modifying the bike's equation? (I'm using d=Vit for it, I suspect it'd end up being Vit+7.5, since the bike's displacement would require it clear the 7.5m gap and as it reaches the final displacement where the truck is)
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    Bike Approaching Stopped Truck at Traffic Lights

    Homework Statement A truck is stopped at a traffic light. The moment the light turns green, it begins to accelerate constantly at 3.1m/s^2. A cyclist approaching the truck from behind with a constant velocity of 10m/s was 7.5m behind the truck when the lights turned green. 1)How much time...
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    Find the Angle Between (A+B) and (A-B) is (A+B)=73(A-B)

    Thanks,the explanation and trig function really helped!
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    Find the Angle Between (A+B) and (A-B) is (A+B)=73(A-B)

    Yeah, I updated it to fix the error. That said, given that the right side has that bothersome coefficient, would it be feasible to simply divide both sides by the same number prior to expanding the brackets? Also, when I -do- expand the left side and attempt to add terms, I can't seem to...
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    Find the Angle Between (A+B) and (A-B) is (A+B)=73(A-B)

    Ah, just noticed that, thanks a lot. That said, would it affect my process significantly? (It evidently cuts down a fair number of terms, thankfully) That said, I'm re-working it now using the new equation, so I may update the question in a few minutes.
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    Find the Angle Between (A+B) and (A-B) is (A+B)=73(A-B)

    Homework Statement Vector A and B have the same magnitude. Given that the magnitude of A+B is 73 times greater than the magnitude of A-B, find the angle between them.Homework Equations sqrt[(A+Acosθ)^2+(ASinθ)^2)]=73sqrt[(A-Acosθ)^2+(-Asinθ)^2] The Attempt at a Solution I managed to start the...