Cars A and B have the same mass, but Car A's speed is 15 mph, whereas Car B is moving at 60 mph. The kinetic energy

of Car B is:

times that of Car A

times that of Car A

2 times that of Car A

4 times that of Car A

16 times that of Car A

Question

Physics

Lilyana Alvarez

29 July, 15:00

Cars A and B have the same mass, but Car A's speed is 15 mph, whereas Car B is moving at 60 mph. The kinetic energy

of Car B is:

times that of Car A

times that of Car A

2 times that of Car A

4 times that of Car A

16 times that of Car A

+2

Answers (1)

Know the Answer?

Seth Frank · Answer 1

16 times that of car A

Explanation:

Moving objects have kinetic energy which is calculated using the formula:

E = (1/2) mv² where m is the mass of the object and v is its velocity.

For car A, kinetic energy = 1/2*m*15²

=112.5m ... i

For car B, the kinetic energy = 1/2*m*60²

=1800m ... ii

dividing ii by i we get

1800m/112.5m = 16.07

Therefore The kinetic energy of car B is 16.07 times that of car A

Cars A and B have the same mass, but Car A's speed is 15 mph, whereas Car B is moving at 60 mph. The kinetic energyof Car B is:times that of Car Atimes that of Car A2 times that of Car A4 times that of Car A16 times that of Car A

Cars A and B have the same mass, but Car A's speed is 15 mph, whereas Car B is moving at 60 mph. The kinetic energy

of Car B is:

times that of Car A

times that of Car A

2 times that of Car A

4 times that of Car A

16 times that of Car A