Look at the formulas to calculate kinetic or potential energy: KE= ½ mv² or PE=mgh
Now, read the problems, first determine if they require calculating potential or kinetic energy. Then, solve them with the appropriate formula and choose the correct answer.
1. A block is on a platform 10m high. It weighs 59N. How much P or K energy does it have?
2. The roller coaster in the local fair is at the top of a 72m hill and weighs 966N. How much P or K energy does it have in this moment?
3. A car is traveling with a velocity of 40m/s and it has a mass of 1200 kg. How much kinetic energy does it have?