A transverse, sinusoidal wave is traveling along a string. It moves in the negative x-direction, and it has an amplitude of 5 cm. At time t=0, the point at x=0 is at a displacement of 4 cm and is traveling upward. What is the phase angle in degrees?
Homework Equations
x = A*cos(\omega*t+\phi)The...
Crud...I messed up again...I mixed up the base of the trapezoid and the bases of the trapezoid...
I FINALLY got 174.414 N as the other builder's force.
I'm really sorry; I'm very confused myself.
Wait, sorry, I mean 1.238 m. So that makes the lead builder's torque...152.32 N*m...and the second builder's force to counter the torque is...211.34 N?
I set up a trapezoid (with an area of half that of the rectangle itself) and got that the lever arm of the lead builder is 1.282 m. So his torque is...152.32 N*m?
So...the triangle of the ramp has a similar triangle inside the drywall. The cosine of the angle is W/(length of line through the rectangle at its center of mass). This is similar to another triangle, with the base of the formed trapezoid as the hypotenuse, meaning that the lever arm of the...
Two builders carry a sheet of drywall up a ramp. They exert vertical forces at the lower corners of the sheet. Assume that W = 2.00m, L = 3.10m, theta = 15.0 degrees, and that the lead builder carries a weight of 123.0N (27.7lb). What is the weight carried by the builder at the rear ?
\tau =...
I think that might be in radians...
Thanks, though. My teacher went over the homework, and it seems that I was measuring the wrong angle. The angle is SUPPOSED to be between the tails of the two vectors, but I was measuring the angle between the tip of the initial and the tail of the final...
[SOLVED] Impulse of deflected ball
1. Recent studies have raised concern about `heading' in youth soccer (i.e., hitting the ball with the head). A soccer player `heads' a 0.421 kg ball, deflecting it by 50.0 degrees, and keeps its speed of 10.40m/s constant. (The deflection angle is the angle...