Direction 63264

A railway car weighing 10 t moves around the Earth at a speed of 10 m/s. Determine the kinetic energy of the car relative to the Earth and relative to another car moving at a speed of 10 m relative to the Earth. s-1, both in the same direction and the opposite direction.

Correct answer:

E1 =  500000 J
E2 =  0 J
E3 =  2000000 J

Step-by-step explanation:

m=10 t kg=10 1000  kg=10000 kg v=10 m/s  E1=21 m v2=21 10000 102=500000 J
v2=vv=1010=0 m/s  E2=21 m v22=21 10000 02=0 J
v3=v+v=10+10=20 m/s  E3=21 m v32=21 10000 202=2000000 J



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