PHYSICS-momentum?

Question

a moving object, x has a mass, M, and speed, V.another moving object Y has twice the momentum of x.the mass and velocity of Y are...
A. 4 M, V
B. 4 M, V
C. 2 M, V
D. 2 M, 1/2 V

sorry B was supposed to be 4 M,!/2 V

Answer 1

C is the only possible answer amongst the ones given, but it's not the only answer. From the information you have given us, we cannot know the mass and velocity independently, we can only know that the momentum of Y is 2mv.

Answer 2

The answer is in the hint itself P initial = P final The initial momentum of student and jacket is zero as they are both not moving The final momentum is the momentum of boy and jacket after he throws the jacket 0 = m1x v1 + m2 x v2 = 3 x 14 + 82 x v2 v2 = - 3 x 14 / 82 = - 0.5 m/s The negative sign shows that he moves in a direction opposite to jacket , so that the sum of his momentum and jacket's momentum is zero As there is no friction he will continue to move without loss of speed

Answer 3

C: 2 M, V

A & B are duplicates...
If one of them was supposed to be: 4 M, 1/2 V
that would also be correct.

Answer 4

(c) 2 M,V

Answer 5

its twice mass C

Answer 6

c

Answer 7

b

Answer 8

i think its C

Answer 9

C