Sebuah lift. Jarum timbangan menunjukkan angka 1000 newton. Apabila percepatan
gravitasi Bumi 10 m/s2 dapatlah
disimpulkan bahwa Seseorang yang
massanya 80 kg ditimbang dalam​

In a game of pool, ball a is moving with a velocity v0 of magnitude v0 = 15 ft/s when it strikes balls b and c, which are at rest and aligned as shown. knowing that after the collision the three balls move in the directions indicated and assuming frictionless surfaces and perfectly elastic impact (that is, conservation of energy), determine the magnitudes of the velocities va, vb, and vc.