Which has more kinetic energy, a 4.0 kg bowling ball moving at 1.0 m/s or a 1.0 kg bocce ball moving at 4.0 m/s? Why?

1 Answer
Junaid Mirza
May 14, 2018

The one with #"1 kg"# mass.

Explanation:

Kinetic energy is given by the formula

#"K" = 1/2\ "mv"^2#

#"K"_1 = 1/2 × "4.0 kg" × ("1.0 m/s")^2 = 2.0\ "J"#
#"K"_2 = 1/2 × "1.0 kg" × ("4.0 m/s")^2 = 8.0\ "J"#

∴ #"K"_2 > "K"_1#

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