Recent content by rsfancy

I used the formula you provided and I still got the answer wrong.I can't imagine I am capable of messing this up this bad. G=6.67*10^-11 M=5.97*10^24 R=6.37*10^6 + 2*10^7 the answer I got was =.001617844 Rounding to two significant figures= .0016 This is driving me insane.I know that...

GPS (Global Positioning System) satellites orbit at an altitude of 2.0×10^7 m. Find the orbital period.(hours)I use the equation T=(2pi/sqrt(GM))r^(3/2). Shouldnt that be the correct way of doing it? I know I am supposed to add the altitude to the radius of the earth, G is known, M of Earth is...

On a cold winter morning, a child sits on a sled resting on smooth ice. When the 9.10 kg sled is pulled with a horizontal force of 37.0 N, it begins to move with an acceleration of 2.50 m/s^2.The 23.0 kg child accelerates too, but with a smaller acceleration than that of the sled. Thus, the...

Wow, thank you very much. That definitely helped me see what was going on. I did get confused at first when you said that acceleration was known, and I did figure it would be gravity but the problem didnt explicitly state we should take into consideration, and I thought it would if we were meant...

Thanks a lot, I really appreciate the help. I was going insane, but I realize I skipped the fact that I needed to find the acceleration first. I won't make that mistake again. Once again thanks for the help!

As a train accelerates away from a station, it reaches a speed of 4.6 m/s in 5.2 s. If the train's acceleration remains constant, what is its speed after an additional 6.0s has elapsed? I know I should be able to do this,but nothing I try works.If anyone could just point me the right way...

A volcano launches a lava bomb straight upward with an initial speed of 28 m/s. a)Taking upward to be the positive direction, find the speed of the lava bomb 2.0 seconds after it is launched. b)Taking upward to be the positive direction, find the direction of motion of the lava bomb 2.0...

A model rocket rises with constant acceleration to a height of 4.0 m, at which point its speed is 25.0 m/s. How long does it take for the rocket to reach this height? Ans: t= 0.32s What was the magnitude of the rockets acceleration? Ans a= 78 m/s^2 "Find the height of the rocket 0.20...