Question

two carts mounted on an air track are moving toward one another. cart 1 has a speed of 0.9 m/s and a mass of 0.54 kg. cart 2 has a mass of 0.67 kg. (a) if the total momentum of the system is to be zero, what is the initial speed (in m/s) of cart 2? (enter a number.)

Answer 1

v=0.725

Step-by-step explanation:

p=mv so momentum of cart 1 is 54x0.9=

0.486 kg•m/s,,, cart 2 has a momentum of 0.67v according to the formula for momentum, so we know that

0.67v+0.486=0.0

now subtract 0.486 from each side to

get

-0.486=0.67v

divide by 0.67 on each side to get

v=0.725