If an object with a mass of #5 kg # changes speed from #5m/s# to #13 m/s#, by how much does its kinetic energy change?

1 Answer
May 17, 2018

Answer:

#"360 J"#

Explanation:

Kinetic energy is given by the formula

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

Change in kinetic energy when there is change in velocity is

#"ΔK" = 1/2\ "m(v"^2 - "u"^2")"#

#"ΔK" = 1/2 × "5 kg" × [("13 m/s")^2 - ("5 m/s")^2] = "360 J"#