What formula do I use for the second question? For number 3 how is one energy converted to the other? ( using arrows ) I get number 4 so I don't need help with that!

#2Use the formula ... Kinetic energy = (1/2) x (mass) x (speed)²#3 - a).sun => energy travels as electromagnetic waves => reaches Earth as         heat & light energy.sun => absorbed in plants => eaten by animals => animals die =>        decay into oil in millions of years => we burn the oil to get the energy. #3 - b).food I ate for lunch => metabolized into glucose by my body        => some of it burned in my muscles to generate energy for immediate needs       => the rest of it stored as fat for future needs.#3 - c).flower pot rolls off the ledge => gravity does work on it all the way down,        producing the kinetic energy it has when it hits the floor.#3 - d).oil or natural gas is burned, releasing heat energy => energy is used        to generate electricity => electricity flows through cables from the       power generating plant to your home => hot plate plugged into the        wall => turns electrical energy back into heat energy => heat energy        is conducted into the bottom of the beaker, flows through the glass       to the inside surface => heat energy is conducted from the inside of        the glass to the water, which gets hotter as it absorbs more energy.  =============================Note:#1 on the sheet is wrong."Work = force x distance"  that's correctBut 25-kg is the mass of the ball, not the gravitational force on it.The force on it is (mass) x (gravity), called its "weight".   That's (25-kg) x (9.8 m/s²) = 245 kg-m/s² = 245 newtons .