Question #34b47

1 Answer

Answer:

#E_k=(603,2074011)/(4,18)=144,307990694 "(Calories)"#

Explanation:

#m=3,15*10^3 lb#

#1 lb=0,45359237 kg#

#m= 3150*0,45359237=1428,8259655 kg"(convert lb to kg)"#

#1" mile=1,60934 km"#

#"v=65 miles per hour"#

#v=65*1,60934=104,6071 "(km per hour)"#

#v=(104,6071*10cancel(00))/(36cancel(00))=29,0575277778 "(meter per second)"#

#E_k=1/2*m*v^2#

#E_k=((1428,8259655*29,0575277778^2)/2)#

#E_k=603,2074011 "Joule"#

#"1 Calorie=4,18 Joule"#

#E_k=(603,2074011)/(4,18)=144,307990694 "(Calories)"#