Recent content by kmb11132

You're exactly right. I'm using the WileyPlus system and it expected scientific notation without explicitly stating so.

Homework Statement A CD has a playing time of 59.8 minutes. When the music starts, the CD is rotating at an angular speed of 460 revolutions per minute (rpm). At the end of the music, the CD is rotating at 202 rpm. Find the magnitude of the average angular acceleration of the CD. Express...

I incorrectly found the work to be the difference between the initial and final kinetic energies above.

Homework Statement A 5530-kg satellite is in a circular Earth orbit that has a radius of 1.81 × 10^7 m. A net external force must act on the satellite to make it change to a circular orbit that has a radius of 8.01 × 10^6 m. What work must the net external force do? Homework Equations...

Thank you so much! I didn't think there was enough information to do that but, well, there definitely was. For the sake of future Googlers coming to this page what I did was... Take this equation: d = v_i*t + .5*a*t^2 and solved for the y displacement: d_y = 0 * .77 + .5 * -9.8 *...

That's what I thought, but I figured in the absence of all other ideas I'd give a 45-45-90 triangle a shot. I tried all of the kinematic equations for projectile motion in every way that I thought made sense and they all incorrectly lead me to a v_ix of 13.38m/s. I know that I'm using the...

Assuming the car fell at a 45 degree angle the magnitude of its x displacement would be 5.23 meters in .77 seconds. Without an x acceleration/assuming constant speed this would work out to a v_ix of 6.79m/s. This is also incorrect. There is still some key to solving this problem that's...

So what I found would be v_av not v_f correct? I'm kind of stuck right now because I don't think I can use equations that incorporate v_f, and those that incorporate v_i, a, d, and t all produce 13.38 as the initial velocity. I don't think I can separate this problem into vertical and...

Homework Statement A child operating a radio-controlled model car on a dock accidentally steers it off the edge. The car's displacement 0.77 s after leaving the dock has a magnitude of 7.4 m. What is the car's speed at the instant it drives off the edge of the dock? @t = .77s displacement is...

Exactly.

Thanks Peter, that makes a lot of sense. So after trying to remeasure and calculate everything accurately here is what I came up with: Segment #1: +25km in 1hr (given data) v_i = 0km/hr v_av = 25km/hr v_f = 50km/hr a_av = 50km/hr^2 Segment #2: +7.25km in 1.2hr (given data) v_i =...

Yes, I attempted to calculate the velocities and average speed. If average acceleration is: (v1-v0)/(t1-t0) then I thought that would be (25km-0km)/(1hr-0hr) in kilometers per hour^2 if it started from rest and traveled 25km in 1 hour. Okay so I see that I'm doing something wrong with the...

Homework Statement The given data is a graph depicting the distance (km) that a bus travels over 3.5 hours. The trip is broken up into three linear segments. I am supposed to find the average acceleration over the entire trip in km/hr^2. I am told that the answer will be negative. Edit...