Recent content by cb

Here's the question: A quality-control engineer samples 100 items manufactured by a certain process, and finds that 15 of them are defective. True or false: (a.) The probability that an item produced by this process is defective is 0.15. (b.) The probability that an item produced by...

I need hlep with this question... A 1.8-kg monkey wrench is pivoted 0.250-m from its center of mass and allowed to swing as a physical pendulum. The period for small-angle osciallations is 0.940 s. a.) What is the moment of inertia of the wrench about an axis through the pivot? b.) If...

Thank you...my mistake. It makes sense now.

Could I say something like this... I_A\omega_A+I_B\omega_B=(I_A+I_B)\omega

I need help starting this problem. How does that fact that the second wheel starting at rest, effect the problem. A wheel is rotating freely with an angular speed of 800 rev/min on a shaft whose rotational inertia is negligible. A second wheel, initially at rest and twice the rotational...

True, but now I still have to solve for the total distance traveled. I was thinking about finding the height with the equation h= v0^2* sin^2(alpha) / (2*g). But since the mass is cut in half, will that make the equation invalid? If that is true I can find the distance for the first...

I need some help with the problem. A shell is shot with an initial velocity v0 of 20 m/s, at an angle of 60 degrees with the horizontal. At the top of the trajectory, the shell explodeds into two fragments of equal mass. One fragment, whose speed immediately after the explosion is zero...

I need help getting in the right direction... Two forces have the same magnitude F. What is the angle between the two vectors if their sum has a magnitude of 2*F? sqrt(2)*F? zero?