An object of mass 20kg increases its velocity from 36km/h to 72km/h. What is the work done
Answers
Answered by
1
Answer:
3000 J
Explanation:
m=20kg
u=36km/hr=36*5/18=10m/s
v=72km/hr=72*5/18=20m/s
W= ΔKE
W=1/2mu²-1/2mv²
W=(1/2*20*20*20)- (1/2*20*10*10)
W=4000J- 1000J
W=3000J
Similar questions