Converting Potential to Kinetic Energy

Example: How fast will a 10 kg brick be traveling just before it contacts the ground, it it falls from a building ledge that is 12 m above the ground? P.E.top = mgh = (10 kg)(9.8 m/s2)(12 m) = 1176 J K.E. = 1176 J = (1/2)mv2 = (1/2)(10 kg)v2 v = 15.3 m/s

Example: How fast will a 10 kg brick be traveling just before it contacts the ground, it it falls from a building ledge that is 12 m above the ground? P.E.top = mgh = (10 kg)(9.8 m/s2)(12 m) = 1176 J K.E. = 1176 J = (1/2)mv2 = (1/2)(10 kg)v2 v = 15.3 m/s