1) a 2000 kg car is traveling at 30 m/s on a level road.

a) What is the car's kinetic energy?

b) what is the car's potential energy?

c) what is the car's mechanical energy?

2) mark has a mass of 55 kg and climbs up a short, steep trail of length 300 m to reach the top of a 100 m tall cliff. Matthew, his twin brother, walks up a gentle, winding trail of length 500 m to reach the top of the same cliff. what is the potential energy of each boy at the top?

3 - death valley, California, has an elevation of 86 meters below sea level. what is the potential energy of a 60 kg teacher in death valley?

Question

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Physics

19 February, 23:40

1) a 2000 kg car is traveling at 30 m/s on a level road.

a) What is the car's kinetic energy?

b) what is the car's potential energy?

c) what is the car's mechanical energy?

2) mark has a mass of 55 kg and climbs up a short, steep trail of length 300 m to reach the top of a 100 m tall cliff. Matthew, his twin brother, walks up a gentle, winding trail of length 500 m to reach the top of the same cliff. what is the potential energy of each boy at the top?

3 - death valley, California, has an elevation of 86 meters below sea level. what is the potential energy of a 60 kg teacher in death valley?

+4

Answers (1)

Know the Answer?

Matthias Wright · Answer 1

The following equations show how kinetic energy (KE), potential energy (PE), and total mechanical energy (ME) are solved.

KE = 0.5mv²

PE = mgh

ME = PE + KE

where m is mass, v is speed/velocity, g is gravitational constant, and h is height.

Substituting for number 1,

KE = 0.5 (2000 kg) (30 m/s) ² 900,000 J

PE = (2000 kg) (9.8 m/s²) (0 m) = 0

ME = 900,000 J

I believe you will be able to answer the rest of the items following the same principles as presented above.