Recent content by sirfinklstin

The range of velocities are 247 to 276 Hz. I divided the angular velocity by the radius instead of multiplying it (thanks for pointing that out). Also I had the variable for Vsound and V source mixed up! Thanks for the help!

after using your 12.56 rad/s, i got 8.3733 m/s and 6.2197 to 6.5309Hz as my range of frequencies, but this does not seem right. Am I missing something?

Homework Statement A speaker is attached to a wire 1.5 m long and is spun in a circle at 2 rev/s. The speaker is connected to an electric piano on which a child is playing a note at 261 Hz. Speed of sound in air is 343 m/s. What range of frequencies will the stationary observer hear? I...

The friction was part of an equation in my physics book, but if you have another equation that would be great.

Homework Statement Consider the conical pendulum, a mass on the end of a string, with the other end of the string fixed to the ceiling. Given the proper push, this pendulum can swing in a circle at an angle theta of 25.5 degrees with respect to the vertical, maintaining the same height...

Ok, I calculated a velocity of 5.26 m/s, but can someone please define the initial velocity and final velocity?? Is initial velocity as soon as the ball drops or as soon as it hits the ground?

How would the velocities be calculated? 0 + (9.8 m/s)(1.41m)?

Homework Statement A golf ball of mass 41.8 g is dropped from a height h = 1.41 m onto a hard floor and bounces back to exactly that same height. What is the average force (in N) on the ball during the 0.012 s that it was in contact with the floor? Homework Equations Impulse = Ft...

(48/100)j ?

Ok, thanks for the help with that, i thought a loss of energy would mean less than 3 m/s for V4, here is what I have now - puck 1 before collision (1/2)(.2)(3.8)^2 1.444 puck 2 before collision (1/2)(.2)(3.8)^2 0 puck 1 after collision (1/2)(.2)(.8)^2 .064 puck 2 after...

Homework Statement One hockey puck of mass 0.2 kg strikes an identical stationary puck on a frictionless ice rink. If the first puck had a velocity V0 = 3.8 m/s before the collision and V1 = 0.8 m/s after in the same direction, what fraction of the energy was lost? Homework Equations...

Yes, at a constant velocity, which means acceleration is 0. I was told by my physics teacher to add the air resistance to the answer of the work energy theorem. Maybe (1/2)mv^2? Sorry, I seem to be caught in a web of stupidity on this one, and this problem is long overdue.

I am completely stuck, because I cannot use the work-energy theorem because there is no acceleration (F = ma), so I cannot calculate anything! Please help!

So the work would be 98 joules? that doesn't seem right either.

Homework Statement A blimp of mass 110 kg is pulled at an angle theta = 52 degrees downwards with respect to the horizontal for D = 7 km on level ground at a constant velocity v = 14 m/s. If the coefficient of drag (K in F = Kv^2) is 0.5 kg/m, how much work is done by the person pulling? As...