A wagon is accelerating down a hill. Which of the following statements are true?

A. As the wagon approaches the bottom of the hill, the potential energy decreases and the kinetic energy increases.

B. The kinetic energy decreases as the wagon comes towards the bottom of the hill.

C. As the wagon approaches the bottom of the hill, the potential energy and the kinetic energy both increase.

D. The thermal energy decreases as the wagon comes towards the bottom of the hill.

Question

A wagon is accelerating down a hill. Which of the following statements are true?

A. As the wagon approaches the bottom of the hill, the potential energy decreases and the kinetic energy increases. 

B. The kinetic energy decreases as the wagon comes towards the bottom of the hill.

C. As the wagon approaches the bottom of the hill, the potential energy and the kinetic energy both increase.

D. The thermal energy decreases as the wagon comes towards the bottom of the hill.

osprey · Answer

A. What goes up must come down. As it comes down it accelerates under gravity. The work done to accelerate it (increase in KE) comes from the grav field of the earth. The field does work. the field loses PE http://perendis.webs.com

zaynwich · Answer

@osprey thank you!

osprey · Answer

Sounds like it helped ... GOOD ... keep going, and good journey and good luck.