Question

A 70kg man runs at a pace of 4 m/s and a 50g meteor travels at 2 km/s. Which has the most kinetic energy?.​

Answer 1

Answer:

meteor is faster

Explanation:

man:  step (1)   1/2*70 *(4*4)

step (2)  35*(4*4)

final step (3) 35*16=560j

meteor:50g= 50/1000kg= 1/20kg

2km/s=2000m/s

1) 1/2*1/20*2000*2000

1/2*1/20*2000*2000       (1/20*200=100)

1/2*100*2000

50*2000         (similarly 1/2*100)

1,00,000j

(prooved)