Question

what is the speed of a 48- kilogram dog running across a lawn with 216 joules of kinetic energy?

Answer 1

The answer is 20.426 m/s. From the equation of Kinetic energy, KE = 1/2 mv^2. An equation for v can be computed using algebra. v^2 = (2KE)/ m then taking its square root this would yield an equation of sqrt ((2 KE) / m).