Q. A 0.44 kg meter stick balances at its center. If a necklace is suspended from one end of the stick, the balance point moves 9.5 cm toward that end. What is the mass of the necklace?
Q. A 0.420- block is attached to a horizontal spring that is at its equilibrium length, and whose force constant is 25.0 . The block rests on a frictionless surface. A 5.40×10-2- wad of putty is thrown horizontally at the block, hitting it with a speed of 2.00 and sticking. far does the putty-block system compress the spring?