Question

A 30kg dog runs at a speed of 15 m/s. What is the dog's Kinetic energy?

Answer 1

A :-) KE = 1 by 2 mv^2
Given - m = 30 kg
v = 15 m/s ( speed = velocity )
Solution -
KE = 1 by 2 mv^2
KE = 1 by 2 x 30 x 15
( cut 2 and 30 because 2 x 15 = 30 )
KE = 15 x 15
KE = 225 J

.:. The kinetic energy ( KE ) = 225 J.