Homework Help: Plss help/its about momentum

1. May 23, 2010

box17

Use the diagram below to answer the next three questions (3-5).
Two blocks, A and B travelling towards each other with equal momenta on a frictionless surface are separated by a spring of negligible mass. The mass of block A is twice that of block B.
Compared with the total momentum of the blocks before the collision, the total momentum after the collision is:

a) the same

b) one-half as great

c) twice as great

d) four times as great
Use the diagram below to answer the next three questions (3-5).
Two blocks, A and B travelling towards each other with equal momenta on a frictionless surface are separated by a spring of negligible mass. The mass of block A is twice that of block B.
After the collision, the magnitude of the momentum of block A compared with that of block B is

a) one-half as great

b) twice as great

c) four times as great

d) the same
Use the diagram below to answer the next three questions (3-5).
Two blocks, A and B travelling towards each other with equal momenta on a frictionless surface are separated by a spring of negligible mass. The mass of block A is twice that of block B.
After the collision, the magnitude of the velocity of block A compared with that of block B is

a) the same

b) twice as great

c) one-half as great

d) four times as great

Attached Files:

• dynamics practice test 4.JPG
File size:
43.2 KB
Views:
123
2. May 23, 2010

tiny-tim

Welcome to PF!

Hi box17! Welcome to PF!

(to clarify: the 3 questions are the same, except that they ask for 1. total momentum 2. compare the momentums 3. compare the velocities)

Tell us what you think the answers are, and then we'll comment.