If a roller coaster train has a potential energy of 1,500 J and a kinetic energy of 500 J as it starts to travel downhill, its total energy is[___]J.
Once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 J, and its potential energy decreases to [___]J.
When the train reaches the bottom of the track and is traveling along the ground, its kinetic energy is[___]J.
Position D:[___]
Position E:[___]
The potential energy is[___]J.
14700
The shelf is[___]m high.
2
A crane lifts a cargo box 10 m off the ground. If the crane lifts the cargo box twice as high, the potential energy will increase by
Boat A and Boat B have the same mass. Boat A’s velocity is three times greater than that of Boat B. Compared to the kinetic energy of Boat B, the kinetic energy of Boat A is
Position A:[___]
When traveling at top speed, a roller coaster train with a mass of 12,000 kg has a velocity of 30 m/s. The kinetic energy of the train at top speed is[___]J.
Position B:[___]
The train can climb a hill that is[___]m high.
Position C:[___]
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