Posted by Kathy on .
Please, help me answer this question.
Two balls are moving in the same direction. Ball A has half the mass of ball B, and is moving at twice its speed.
(a) Which ball has the greater momentum?
(b) Which ball has greater kinetic energy?
Thank you

Physics (ASAP PLEASE) 
bobpursley,
momentum is mass*velocity
momentumA=M/2*2V=MV
momentumB=MV
they have the same momentum
KE=1/2 m v^2
KEA=1/2 m/2*(2v)^2=mv^2
KEB=1/2 m *v^2=1/2 mv^2