The discussion revolves around a physics problem involving a ball colliding with a wall at an angle of 60 degrees. The participants are examining the momentum of the ball before and after the collision, as well as the forces involved during the impact.
There is an ongoing exploration of the relationship between the momentum before and after the collision, with some participants providing hints and corrections regarding the calculations. The discussion is dynamic, with multiple interpretations being considered, particularly around the geometry of the situation and the role of time in the calculations.
Participants are working under the constraints of a homework assignment, which may limit the information they can use or the methods they can apply. There is also a focus on ensuring that the calculations align with the physics principles being discussed.
rzlblrt417 said:Homework Statement
a ball hits a wall at 60 degrees from the wall and leaves the wall at 60 degrees.
v1 = 10 m/s
v2 = 10 m/s
m = 3.00 kg
t = 0.200s
Homework Equations
p = mvcos(angle)
J = p2 - p1
The Attempt at a Solution
p = (3.00)(10)(cos(60))
p1 = 15
p2 = 15
and that is as far as i can get. I am not sure how time plays into this. Any help is appreciated. I have the text in a few hours. Thank you
rzlblrt417 said:*by wall on the ball
sankalpmittal said:Got that ! Ok so what is p1 ? Or I mean momentum of the ball before striking the wall ?
Then you find out p2 or the momentum of ball after it stroke the wall.
What do you get ?
rzlblrt417 said:the same thing for p1 as p2?
sankalpmittal said:No p1 and p2 aren't same. Be careful regarding geometry.
Hint : see the image : http://postimage.org/image/qvnhzhnsl/
rzlblrt417 said:ok so then
p1 = (3.00)(10)cos(30)
p2 = (3.00)(10)cos(60)
so p2 - p1 = -14.133 so then it would just be 14.133N?
or is it sin(30) making it 14.5N
sankalpmittal said:Correct.
Right !
Nope. What about time t ?
From Newton's second law : F= Δp/Δt = p1-p2/t
Plug in it. What do you get ?
Do calculations properly. You got it wrong for p1-p2 also.
rzlblrt417 said:OH! ok so then after plugging everything in i got 71.6N!