Question

A popular swinging-balls apparatus consists of an aligned row of identical elastic balls that are suspended by strings so they barely touch each other. When two balls are lifted from one end and released, they strike the row and two balls pop out from the other end. If instead one ball popped out with twice the speed of the two, this would be a violation of conservation of:_______

a. momentum
b. kinetic energy
c. both of these
d. none of these

Answer 1

b. kinetic energy

Step-by-step explanation:

A popular swinging-balls apparatus consists of an aligned row of identical elastic balls that are suspended by strings so they barely touch each other. When two balls are lifted from one end and released, they strike the row and two balls pop out from the other end. If instead one ball popped out with twice the speed of the two, this would be a violation of conservation of kinetic energy.

Kinetic energy is the is energy of an object in motion; in swinging the balls,K.E would not be conserved in the collision though the momentum would be conserved in such release.

Answer 2

A) Momentum

Step-by-step explanation:

Law of Conversation of Momentum:

If two object collide the total momentum of each individual object before collision is equal to the momentum of the two object after the collusion. That means there is no change in momentum and the speed is constant after collision

In the course where one of the balls pop out with twice the speed of the two, the theory supporting the conservation of momentum will be violated. This can be seen from the highleighted sentence from the first paragraph.