Question

The chart lists the masses of four balls that have the same momentum.

A 2-column table with 4 rows. The first column labeled Ball Color has entries Green, Red, Yellow, Purple. The second column labeled Mass (kilograms) has entries 0.5, 1.2, 0.9, 1.7.
Which correctly compares two of the balls?

The green ball has a lower velocity than the purple ball.
The red ball has a greater velocity than the purple ball.
The yellow ball has a higher velocity than the green ball.
The red ball has a greater velocity than the green ball.

Answer 1

Only the second statement is correct: "The red ball has a greater velocity than the purple ball."

Reason: all have the same momentum p, so v = p/m. Velocity is inversely proportional to mass, so the smaller mass has the larger velocity. Masses: green 0.5 < yellow 0.9 < red 1.2 < purple 1.7, hence velocities are in opposite order.