Question

A 5.0 kg block with a speed of 3.0 m/s collides with a 10 kg block that has a speed of 2.2 m/s in the same direction. After the collision, the 10 kg block is observed to be traveling in the original direction with a speed of 2.7 m/s.

(b) By how much does the total kinetic energy of the system of two
blocks change because of the collision?

________ J

(c) Suppose, instead, that the 10 kg block ends up with a speed of
4.2 m/s. What then is the change in the total kinetic energy?

___________ J

(d) Account for the result you obtained in (c).

Answer #1

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