Recent content by RubiksMelia

Thanks! I should have had a look at simple harmonic motion. Silly me for tackling a question before knowing what everything meant. Thanks to all for the help.

But, at t = 0, shouldn't the pendulum be at rest in the center (rather than the left or right extremity)?

Homework Statement The speed of a pendulum bob moving in simple harmonic motion is given by v = 1.26sin(2πt) where v is in m/s and t is time in seconds. Homework Equations s = ∫ v dt The Attempt at a Solution v = 1.26sin(2πt) Integrating v yields s = -0.2cos(2πt) + c and solving for c...

I just had a look at all of the question again and realized that the units which the force was given in are kg wt. I forgot to make the conversion between kg wt and N, and that threw me out. (2t - 3t^2) kg wt = g(2t - 3t^2) N Using F = g(2t - 3t^2), the correct answer of -91.08m/s was obtained.

Homework Statement A body of mass 5 kg is acted on by a force in a straight line. The magnitude of the force after t seconds is given by (2t - 3t^2) kg wt. If the body has an initial velocity of 3ms-1 in the same direction as the force, calculate its velocity after 4 seconds. Homework...