For a balloon to rise in the air, the lifting force must be greater than which force: Gravity,
Normal, or Friction?
Help please
Mark brainlist

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion

The force it would take to accelerate an 900-kg car at the rate of 6m/s2