Recent content by courtney1121

lol ok and thanks so much for that website, it definitely helped. It was exactly what I was looking for.

What does the effective mass of the spring mean?

Any real spring has mass. Do you think that this mass would make the actual period of a real harmonic oscillator longer or shorter than the period predicted by the equation T= 2*pi*square root m/k. Explain your reasoning. I think it will affect the period because I am thinking that the mass...

Finding the Spring Constant -- Help! Algebra Issues! Molecular bonds can be treated like springs. From the vibrational frequencies of the bonds, one can determine the appropriate spring constants. Hydrogen, H2, has a vibrational frequency of 1.3192 X 1014Hz. Deuterium, D2, is an isotope of...

I found the time to be .5s because v/g so the height for the ball is 5*.5 + (.5)*9.8*(.5)^2 which is 6.225m.

y = 1/2gt^2?

or actually height would be v0t+(.5)at^2...?

so one is in the x direction and the other is in the y direction. ball is in the x and the doll is the y direction. x = x0 + v0xt y = y0 +v0yt - 1/2gt^2 or am I looking at this wrong?

Consider the following: You have a toy gun that shoots ping-pong balls at about 5 m/s. You aim the gun at a doll sitting on a fence. Just as you pull the trigger, a friend of yours (or so you thought) nudged the doll forward, just enough to fall off the fence. Will the ping-pong ball hit the...

well i don't think velocity would be constant cause velocity is magnitude and direction and the direction changes so it would change, I think. I'm pretty sure I'm considering the projectile in the zx plane so y will always be 0.

oh ok, so even if you shoot the firework straight up, it still needs an angle?

As a projectile moves along its parabolic trajectory, which of the following remain constant (ignoring air resistance, and defining the z-axis to point upward)? More than one answer may be correct! a. Its speed. b. Its velocity. c. Its x-velocity and its y-velocity. d...

Anyone have an idea?

If a fireworks rocket has an initial upward speed of 58 m/s when launched, for how long will it coast before reaching its peak? So could I use the equation t=v0z/g? When I use this I get the peak to be 5.9s. Is v0z = 58 m/s or would that be 0? Am I approaching this correctly?

From using that equation I got speed to be 84.5m/s...does that sound right?