Part A
One student wants to increase the potential energy of the marble at the starting position Explain one way the students can alust
the track to increase the marble's potential energy
In your explanation
describe the dimensions of any materials used to adjust the track and
explain why the adjustment to the track would increase the marble's potential energy

Thomas his older brothers, who own a junk yard, on the weekends to earn extra money. he likes to them push broken-down cars to the back of the junk yard because it makes him feel strong. last saturday, they pushed three cars with different weights, and he noticed he used different amounts of force for each one. the cars were the following weights: white car: 2,700 kg red car: 1,500 kg blue car: 2,100 kg think about how much force is needed to move each car. which correctly lists the cars in order from the most to least amount of force needed to move them? a) white, blue, red b) blue, red, white c) red, white, blue d) white, red, blue

The electric potential a distance r from a small charge is proportional to what power of the distance from the charge? a. r^-1 b. r c. r^-2 d. r^2

If a star is moving toward earth, it is