Recent content by schyuler2

Patience, young Skywalker.

Homework Statement Find the initial speed of a block which travels 10m along a horizontal surface if \mu= 0.40 between the block and the surface before stopping. Homework Equations \SigmaW = 1/2mvB2 - 1/2mvA2 + mgyB - mgyA \SigmaW = W * dAB * cos (W, dAB) f = \mu* N N=...

Total distance: 45.9 + 23.4 = 63.9 m avg speed = dist/time avg speed = 63.9 m / 5 sec avg speed = 13.9 m/sec^2

Thanks! so, y =V_yo(t) - 0.5gt^2 y = 30(5) - 0.5 (9.8) (5)^2 y = 150 - 4.9 * 25 y = 150 - 122.5 y = 27.5 m then... Vavg = dABy / t Vavg = 27.5 m /5 sec Vavg = 5.5 m/sec

well if it travels a total of 2*45.9m ... then the dABy = 91.8 so: average velocity = dABy / t = 91.8/5 =18.36 m/sec ?

Homework Statement A 20kg block is held in equilibrium by two massless cords, A, B. A is attached to the wall and B is attached to the ceiling. Find the magnitudes of the tensions of the cords. Visual: http://i758.photobucket.com/albums/xx228/schuyler2_va/untitled.jpg?t=1260816320...

Homework Statement A projectile is thrown from the horizontal ground with a speed of 40 m/sec at an angle with the horizontal of 30 degrees. At what height will the projectile strike a high barrier located at a distance of 85m from the firing point? Homework Equations ok so: point A is...

Homework Statement A ball is thrown straight upward from the ground with a speed of 30 m/s. What is the average speed of the ball in the first 5 seconds? Homework Equations VBy2 = VAy2 + 2(ay) * dABy VBy = VAy + ay * change in time Average velocity = dABy / change in time The...