Asked by Cam
How do I figure out how long it takes two runners to have the same momentum if I am given a, m, and Vi for both runners?
Runner A= 85kg, 2ms-2, Vi=1ms-1
Runner B= 65kg, 3ms-2, Vi=0ms-2
I don't want an answer, just which equations to use or a hint.
Runner A= 85kg, 2ms-2, Vi=1ms-1
Runner B= 65kg, 3ms-2, Vi=0ms-2
I don't want an answer, just which equations to use or a hint.
Answers
Answered by
Scott
momentum is mass times velocity
velocity is ... Vi + (a * t)
write their momenta in terms of t
set the expressions equal, and solve for t
velocity is ... Vi + (a * t)
write their momenta in terms of t
set the expressions equal, and solve for t
Answered by
Cam
So p=m*Vi + (a*t)
85*1+2t=65*0+3t
85+2t=3t
85=t?
Which is incorrect obviously. I know from other failed methods that the answer is ~3.7seconds.
What am i doing wrong?
85*1+2t=65*0+3t
85+2t=3t
85=t?
Which is incorrect obviously. I know from other failed methods that the answer is ~3.7seconds.
What am i doing wrong?