Solving Laws of Motion: Calculating Distance on a Plane

shedog123
Messages
1
Reaction score
0
Help me please!

please help my ap class just started on laws of motion and I am having problems with this question could some one please walk me through it
]
a block is given an intial speed of 3.0 m/s up the 22.0 degree plane how far up the plane will it go? B0 how much time elapses before it returns to its starting point ignore friction.

thankyou so much!
 
Physics news on Phys.org
Try drawing a free body diagram. What does it mean when the block comes to rest? If there is no friction, what other forces could be acting on the block to slow it down? Also remember there are two times here, one for the trip up and one for the trip down.
 
Thread 'Need help understanding this figure on energy levels'
This figure is from "Introduction to Quantum Mechanics" by Griffiths (3rd edition). It is available to download. It is from page 142. I am hoping the usual people on this site will give me a hand understanding what is going on in the figure. After the equation (4.50) it says "It is customary to introduce the principal quantum number, ##n##, which simply orders the allowed energies, starting with 1 for the ground state. (see the figure)" I still don't understand the figure :( Here is...
Thread 'Understanding how to "tack on" the time wiggle factor'
The last problem I posted on QM made it into advanced homework help, that is why I am putting it here. I am sorry for any hassle imposed on the moderators by myself. Part (a) is quite easy. We get $$\sigma_1 = 2\lambda, \mathbf{v}_1 = \begin{pmatrix} 0 \\ 0 \\ 1 \end{pmatrix} \sigma_2 = \lambda, \mathbf{v}_2 = \begin{pmatrix} 1/\sqrt{2} \\ 1/\sqrt{2} \\ 0 \end{pmatrix} \sigma_3 = -\lambda, \mathbf{v}_3 = \begin{pmatrix} 1/\sqrt{2} \\ -1/\sqrt{2} \\ 0 \end{pmatrix} $$ There are two ways...
Back
Top