Question

The table shows information about four students who are running around a track.

A 3-column table with 4 rows titled Motion of Students. The first column labeled Student name has entries Autumn, MOhammed, Lexy, Chiang. The second column labeled Mass (kilograms) has entries 50, 57, 53, 64. The third column labeled Velocity (meters per second) has entries 4, 3, 2, 5.
Which statement is supported by the information in the chart?

Mohammed has less kinetic energy than Autumn.
Lexy has more kinetic energy than Mohammed.

Answer 1

Use kinetic energy KE = 1/2 mv^2.

Autumn: KE = 0.5(50)(4^2) = 25·16 = 400 J
Mohammed: KE = 0.5(57)(3^2) = 28.5·9 = 256.5 J
Lexy: KE = 0.5(53)(2^2) = 26.5·4 = 106 J

Therefore:
- "Mohammed has less kinetic energy than Autumn." — true (256.5 J < 400 J).
- "Lexy has more kinetic energy than Mohammed." — false (106 J < 256.5 J).