Which best describes Lenny's error? Lenny wrote the steps he used to find the mass of an
object with 400 J of energy moving at a velocity of 8
m/s.
1. Find the square of 8 m/s, which is 64 m²/s2.
2. Divide kinetic energy, 400 J, by 64 m²/s2, which is
6.25 J per m²/s2
3. Divide 6.25 J per m²/s2 by 2 to get a mass of 3.125
kg.
O In Step 1, he should have found the square root of
400 J instead of squaring 8 m/s.
O In Step 1, he should have multiplied 8 m/s by 2
instead of squaring it.
O In Step 2, he should have divided 64 m2/s2 by 400 J
instead of dividing 400 J by 64 m2/s2.
In Step 3, he should have multiplied 6.25 J per m²/s?
by 2 instead of dividing it by 2.