Can kinetic energy of a system or gravitational potential energy be negative?
I am reading about the two but its very complex and can't seem to describe why.
Let me try to draw this out
--------------------- <-- R2 <30degree
\ R1<50degree /
\ /
\ /
\ /
\ /
\ /
\ / T2 is acting north along the 30 degree (R2)...
Hello everyone, I have a physics test coming up and am working on the Pre-test however I have run into a problem and cannot find the proper equations anywhere to solve this...
Box B has a mass of Mb=35.2kg and moves with a constant velocity along the x axis. The track has a friction...
Okay
X=Vo*t+1/2*a*t^2
x=2.80 m/s + 8.5s + .5 * 11.3 m/s^2 * 8.5s^2
Ok so I first do my exponent with time 8.5 * 8.5 = 72.25
but do I multiply that by 11.3 * .5 or do i have to square the 11.3 (acceleration) which is 127.69.
so is it 11.3 * .5 * 72.25 or 127.69 * .5 * 72.25?
Im new to this stuff so bear with me. I am really only looking for help as to what equation I use to find these answers.
A truck covers 40.0m in 8.50s while smoothly slowing down to a final speed of 2.80 m/s.
A. Find the trucks original speed.
B. Find the its acceleration.
Hi I am studying for this first physics test and having trouble.
heres the equation I am using to find x and I am sure its right but i can't seem to get the answer they do
x=8.0m/s*5.0s +.5 * 3.0m/s^2 * (5.0s)^2 = 77.5
I am not getting the 77.5
8 *5 = 40
3.0 x 5.0 = 15
15 *...
If somethings velocity is 0 can the acceleration be 0? If so why?
I have been trying to answer this and it seems I come up with different opinons from the text to the internet.
Which is it??
Ok here's the question and what I have solved so far
Grass grows densely everywhere on a 1/4 acre plot of land. What is the order of magnitude of the number of blades of grass? Explain your reasoning. Note that 1 acre = 43560 ft^2.
Ok. 43560/4 to get the 1/4 acre = 10890 ft^2
Now I...
The radius of the Earth is 6.37X10^6 meters. Determine the volume of the Earth to the correct number of sig figures.
to find the volume I used 4/3 (3.14)(6.37x10^6)^3
3.14(2.58x10^20) = 8.10x10^20
4/3 or...