Mechanical Comprehension第 102 / 120 题
Which object has the most gravitational potential energy?
a.A rock at the bottom of a hill
b.A rock at the top of a hill
c.A rock rolling on flat ground
d.A rock resting in a valley
解析
Gravitational potential energy increases with height. A rock at the top of a hill is highest, so it has the greatest stored energy ready to convert to motion.
免费刷完整 120 道题库 — 无需注册。
同考点相关题目
- In a class-one lever, the fulcrum is located:
- Two gears mesh together. If the driving gear turns clockwise, the driven gear will turn:
- A smaller gear driving a larger gear will cause the larger gear to turn:
- Increasing the length of a lever's effort arm will:
- Air pressure is greatest at:
- A wedge is used to: