The kinetic energy KE of an object of mass m moving with velocity v is defined as KE = 1/2 mv². If a force f(x) acts on the object, moving it along the x-axis from x₁ to x₂, the Work-Energy Theorem states that the net work done is equal to the change in kinetic energy: 1/2 mv²₂ – 1/2 mv²₁, where ν₁ is the velocity at x₁ and ν₂ is the velocity at x₂.

How much work (in ft-lb) is required to hurl a 12-lb bowling ball at 20 mi/h?