Recent content by gbaby370

Whoops, what I meant was; d=v1t+.5at^2

Δd=v1Δt+aΔt^2 This should answer your question.

Exactly, so assign directional convention to your problem and you will get it!

Break the initial and final velocities into x and y components to find Δv. Use v2-v1 on to find that change in velocity on both x and y, then use trig to find hypotenuse and that will be your Δv. Good luck

A very simple way to solve this, assuming this is a closed system, would be to use the attached formula (Egmax=Ekmax); rearrange algebraically. I would assume the force the ground exerts on her would be gravity, so F is mg or F=Wg. Hope this helps.

If you're getting 471, it could just be a matter of how you're rounding some of the variables like pi or the radius of the Earth. I used the exact same equation using the pi option on my calculator and for r, I used 6.378x10^6 and I got 463.82m/s. Hope this helps!

Oh ya? Thanks for you help.

Ok, how does this look?

Ok so I rearranged and got the correct answer. I was just wondering if this equation I've attached can be reduced even further?

Thanks for your help! I looked over it again and found the answer I was looking for.

I am doing a problem which involved determining how fast a rocket was launched off the Earth to reach a maximum height. I am looking for some assistance with some simple algebra. The formula used is; Etotal = -Gm1m2/r+0.5m2v^2 To isolate for v, would my equation be...

Sorry anywhere it says proton it should say electron.

Hey, I was just wondering if someone could give me feedback on a problem. For some reason the answer is not in the back of the text. Homework Statement An x-ray with a wavelength of 2.5 x 10-8 m is absorbed by a stationary electron. Determine the final velocity of the electron. Vxray=3.0x10^8...

Solve for height using mgh=(.5)mv^2 Then use kinematics to solve for time.

Simplest way to solve this problem, Use work energy theorem, fcosθd=(0.5)mv^2 (cosθ= 1 assuming all force is in the same direction as the displacement) Rearrange algebraicly and you'll get the answer. Hope this helps!