Aroller coaster track is a good example of the law of conservation of energy. use this law to explain these facts about a roller coaster track. a. the largest hill for a roller coaster track is the first hill on the track. the hills after the first are smaller and smaller. b. to get to the top of the first (highest) hill, a motor pulls the cars up to the top. after the top of the first hill, a motor is not needed to keep the cars going. c. the roller coaster car moves really fast at the bottom of a hill on the track but slows down as it moves up a hill (not including the first hill).

2) why do satelites not fall while revolving around the earth?

Clara is shopping in a grocery store with her friend. each has their own shopping cart in which they want to place their items. the shopping carts are identical. clara and her friend add the same type and number of items to each of their carts. in the baking aisle, however, clara adds 20 pounds of sugar to her own cart, and her friend adds only 10 pounds of sugar to her own cart. which of the following statements best explains what clara must do to accelerate at the same rate as her friend? a. she must add more sugar to her cart. b. she must apply more force to move her cart. c. she must add 20 pounds of salt instead of 20 pounds of sugar to her cart. d. she must apply less force to move her cart.

Jaylen is a championship runner of the school's track team. during one of his trials, his speed was measured at 15.1 m/s. find jaylen's kinetic energy during that trial if his mass is 54.6 kg.