Slowly, the chest rose. When it broke the surface, Milo gasped. "It worked!"
Captain Granit shook his head. "Water fights back. That's and drag ." np fysik åk 9
"Lifting it too fast could snap the rope," the captain warned. " – force causes acceleration. Too much acceleration breaks things." 4. The rescue They used a hand-crank connected to a block-and-tackle. Alva felt the force in her arms. "This is mechanical advantage ," she said, sweating. "The rope pulls many times, so my force is multiplied." Slowly, the chest rose
"That's how much energy we need to give the chest to lift it," she said. "Can't we just pull it straight up?" Milo asked. "Water fights back
"I know exactly where a sunken treasure chest is," he said, pointing to a rusty anchor. "But the winch is broken. We need to lift the chest from the seabed. It's 50 meters down and weighs 200 kg."