Np Fysik Åk 9 May 2026

Alva’s eyes lit up. "Wait, this is real physics. Let me think."

"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." np fysik åk 9

"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. Alva’s eyes lit up

"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." "But the winch is broken