Many points! how much work does a weightlifter do if he lifts a 400 newton barbell 3 meters high- 15

How well does the extrapolated value (the slope of the trend line) agree with the accepted value of free-fall acceleration (g = 9.8 m/s2)?

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic

Asap i'm in class rn a 1,000-kg car is traveling 20 m/s on a flat stretch of road. it gets to a hill and coasts uphill until it stops. how high up the hill does the car travel? givens: equation: 1/2mv2initial=mghfinal solve for h. plug & chug, label.