Recent content by niki4d

The last diagram would be the same thing wouldn't it.. is this the right way?

Would that be the right diagram or am I doing this completely wrong.. :bugeye:

Here is the diagram I drew. The 30 degree angle is on the left side. On the hypotnuse side I got .006kgm/s. and solving it for the stationary ball, i got the velocity as 1.04 m/s. (Used p=mv) Shouldnt 1.04m/s be for the incident ball though?

Apparently not.. next time I'll try a picture..

Oh, no.. the vector diagram didn't turn out in the post.. a ----> \ | \ | \ | \ | \ | the hypotnuse is where i put the p=mv equation and solved. I ended up with the velocity of the horizontal vector, which is not correct. I hope this diagram shows up!

Homework Statement A 5.00 X 10^-3 kg steel ball moving 1.20m/s collides elastically (no loss of kinetic energy) with an identical, stationary steel ball. The incident ball is deflected 30 degrees from its original path. (a) Draw a vector diagram showing the paths of both balls after the...

Yeah.. more than likely it is.. thanks for the help!

Hmm.. that makes sense.. but the answer to that would be 1.163m/s. The answer is 0.97m/s. I don't know how to get to that..

Sorry.. forgot the last part.. I got v[SIZE="1"]f=0.7065m/s Im not sure if this is right or not.. it SEEMS like an okay speed.. but I havn't done this type of question before.. so just want to be sure. Thanks!

Homework Statement A 82kg girl is coasting along the floor on a large 2.0kg skateboard. If she is moving 1.8 m/s when a 46kg boy jumps on to the same skateboard, what is the speed of the skateboard immediately after the boy jumps on it? Homework Equations Sum of Initial Momentum = Sum...

Okay, Thank You! =)

Oh, okay, thank you. Question: A stone is thrown straight up with a speed of 15.0 m/s. How fast will it be moving when its altitude is 8.0 m above the point from which it was thrown? How much time elapses while the stone is reaching that height? (Is there one answer or are there two...

Here is my question: A stone is thrown straight up with a speed of 15.0 m/s. How fast will it be moving when its altitude is 8.0 m above the point from which it was thrown? How much time elapses while the stone is reaching that height? (Is there one answer or are there two answers? Why?)...