On a cold winter day, a penny (mass 2.50 g) and a nickel (mass 5.00 g) are lying on the smooth (frictionless) surface of a frozen lake. with your finger, you flick the penny toward the nickel with a speed of 2.35 m/s. a) the coins collide elastically; calculate both of their final speeds

0.78333 m/s in the opposite direction

1.566 m/s in the same direction

Explanation:

= Mass of penny = 0.0025 kg

= Mass of nickel = 0.005 kg

= Initial Velocity of penny = 2.35 m/s

= Initial Velocity of nickel = 0 m/s

= Final Velocity of penny

= Final Velocity of nickel

As momentum and Energy is conserved

From the two equations we get

The final velocity of the penny is 0.78333 m/s in the opposite direction

The final velocity of the nickel is 1.566 m/s in the same direction

12000j is work done

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