A3.0 kg mass moving to the right at 1.4 m/s collides in a perfectly inelastic collision with a 2.0 kg mass initially at rest. what will the velocity of the combined mass be after the collision? show your work.

0.84 m/s

Explanation:

we can solve the problem by using the law of conservation of momentum: the initial momentum must be equal to the final momentum, so we can write

where

is the first mass

is the initial velocity of the first mass

is the second mass

is the initial velocity of the second mass

is the final velocity of the two combined masses after the collision

Re-arranging the equation and substituting the numbers, we find

according to jean piaget, in what stage of cognitive development are children able to understand conservation task?

b. preoperational

just took it