Np Fysik Åk 9 ~upd~ May 2026

"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."

Milo groaned. "That sounds like a physics problem. I'm out." np fysik åk 9

Alva’s eyes lit up. "Wait, this is real physics. Let me think." "I know exactly where a sunken treasure chest

Slowly, the chest rose. When it broke the surface, Milo gasped. "It worked!" It's 50 meters down and weighs 200 kg

Captain Granit shook his head. "Water fights back. That's and drag ."

"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."

Captain Granit smiled. "Good. Let’s start with , young navigator." 1. Energy – The invisible currency "The chest at the bottom has potential energy because it’s deep," the captain explained. "But we need to give it kinetic energy to move it up."