Homework Answers
When speed is increased by a factor of three,
New speed v'= 3v where v is the initial speed
a) Momentum P= mv
So new momentum P'= mv'= m*3v= 3 mv= 3P
So momentum increases by a factor of three
b) Kinetic Energy KE=m(v^2)/2
New Kinetic Energy KE'= m(v'^2)/2= m((3v)^2)/2= 9 m(v^2)/2= 9 KE
Therefore kinetic energy increases by a factor of 9
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PLEASE ANSWER ALL PROBLEMS CORRECTLY.
THANK YOU FOR YOUR HELP!
PROBLEM 1
PROBLEM 2
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For part c, I tried -242 and +242 and I still got it
incorrect.
(20%) Problem 4: The shadow of a pendulum cast on a flat board moves on a straight line. By placing the x-axis on the straight line with the origin at the middle of the total path, the x-coordinate of the shadow is given by the following function: x(t) = 49cos(st), where t is in seconds and x is in centimeters. 25% Part (a) Find the speed,...
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