Recent content by Mikejax

Moments and force couples...confused! Homework Statement I have attached 2 pdfs: 1 is the problem, the second is the solution. I need help understanding the solution. Diagrams included. The gist of the problem: Need to calculate a dimension "a" such that a resultant couple (from 2 force...

Homework Statement A ball of mass 0.150 kg is dropped from rest from a height of 1.25 m. It rebounds from the floor to reach a height of 0.960 m.* What impulse was given to the ball by the floor? Homework Equationsimpact speed is given by (1/2)mv^2 = mgh1. rebound speed is given by (1/2)mv^2...

any ideas?

Ok, so my textbook uses the following equation for energy of the ball as it swings mgrcosθ = 1/2mv^2. I understand that formula means that the potential energy (left side) = kinetic energy (right side) and that the energy has been conserved. And I understand using trig to reflect the...

Ok so, how does one link the two energies together? I assume forces here are conservative so Ui + Ki = Uf + Kf mgh + 0 = mgh + 1/2mv^2... how does cosθ incorporate into this equation, or what is a better way to equate the problem?

Could one treat that as a general formula for pendulum motion? that (v^2)/r = 2gcosθ? Can I apply this to any problem of this nature?

Homework Statement A 2.kg ball is attached to the bottom end of a length of fishline with a breaking strength of 44.5N. The top end of the fishline is held stationary. The ball is released from rest with the line taut and horizontal (θ = 90 degrees). At what angle θ (measured from the...