Recent content by Phys121VIU

Wow..its definitely not squared..thanks:P Found the answer..1.38rad/s!

Homework Statement A thin, uniform metal bar, 3m long and weighing 75N, is hanging veritcally from the ceiling by a frictionless pivot. Suddenly it is struck 1.3m below the ceiling by a small 2 kg clay ball, initially traveling horizontally at 14m/s. The ball sticks to the bar Find the...

Gravity? I'm not sure what your asking..

A cyclist has a speed of 5 m/s when she beings to coast down a hill, as shown in the figure. At the bottom of the hill, her speed has increased to 12m/s. the mass of the cyclist plus bicycle is 75kg. a) Calculate the work done by gravity on the cyclist and bicycle. b) Calculate the...

I see, its traveling at constant velocity so it is the same all along the arc. velocity = d / t = 235m / 36.0s = 6.53m/s and with that, the radial acceleration can be found : arad = v2 / r = (6.53m/s)2 / 149.6m = 0.285 m/s2 = 0.285 m/s2 \hat{i} Thank you! EDIT***...

Homework Statement A car is traveling eastward turns north by traveling in a circular path at uniform speed as shown in the picture. the length of arc ABC is 235m and the car completes the turn in 36.0s a) Find the acceleration vector of the car when it is at B. Express answer in terms of...

How would I find the angle of the expected radial accel vector with just the knowledge of the total accel vector being 20° north of east? Are the tangential accel and radial accel vectors perpendicular to each other? Therefore making it possible to use sin/cosine laws to find the missing...

Homework Statement A car changes speed as it turns from traveling due south to heading due east. When exactly halfway around the curve, the cars velocity is 19m/s at 45° south of east. At this moment, the cars total acceleration is 3.0 m/s2 at 20° north of east. Calculate the radial and...

why not?

Homework Statement Ball A is dropped at t=0 from a window. At t=6, the ball hits the ground. Neglect air resistance for question a) Suppose that at t=1, Balls B and C are thrown vertically down from the same window. Ball C has a greater initial velocity than Ball B, as shown by their...

Thanks for this! Ok i am beginning to understand this question..To translate, say the top point of the object, \begin{bmatrix}-1 \\ 3\end{bmatrix} to the new coordinate \begin{bmatrix}2 \\ 5\end{bmatrix} i would use \begin{bmatrix}1 & 0 & 3 \\ 0 & 1 & 2 \\ 0 & 0 &...

This was a question for a test of mine. I am unsure how to translate the object from the left image(Fig.1) to the right (Fig.2). I am to use matrix multiplication.. Do i start with the vertices in Fig.1 as a matrix, as in |0 -1 -2 0 -2 -1 | ...............|0 0 0 2 2 3 | (I...

I got it figured out, I was definitely over thinking it. The tension in the ropes are equal to the weight of the blocks, so rope AB is 200lb and AC is 100lb. Then I find the Sum of forces for X and Y and solve for the unknowns! Thanks!

Homework Statement http://imageshack.us/photo/my-images/851/45009287.png/ The problem(s) are shown in the link, but I'm having trouble getting them started. Homework Equations The Attempt at a Solution For 3-12: I think what I need to do is find the tension force in the...

Thank you PeterO, i believe i understand now, for B) even though the pail is moving up, it is at a constand speed so Fg-Ft = Fn. Fn=ma=0 so Fg=Ft! Thank you!