tahjzionhogan8751 tahjzionhogan8751
  • 04-04-2018
  • Physics
contestada

It takes 160 kj of work to accelerate a car from 24.0 m/s to 27.5 m/s. what is the car's mass?

Respuesta :

kiaratatiana7p6mdlk
kiaratatiana7p6mdlk kiaratatiana7p6mdlk
  • 08-04-2018
Work-Energy :W = 1/2 m ( Vf^2 -Vo^2 )
Vo = 24.0 m/s Initial speed 
 Vf = 27.5 m/s  Final speed 

W = 1/2 m ( Vf^2 -Vo^2 )
160 kj = 1/ 2 m ( 27.5^2  -24.0 ^2)
160kj =  4680 x m
convert kilo joules to jeoules                     160000 j = 4689 xm
m = 160000 j/4689
m = 34.18 kg
Answer Link

Otras preguntas

what is structure of the atom and charge of relative mass
Find P(Z > 3.89) Pls I need help
What percentage of the circle is shaded? * Between 0 and 25% Between 25% and 50% Between 50% and 75% Between 75% and 100% 1 point​
12 sınıf Matematik bilimi islam dünyasında X.yüzyılda hangi konularda ilerleme kaydetmiştir
Please help verify the identity of cos (x+ -5pi/4) = -sqrt2/2 (cos x + sin x)
How much gravity does it require to stop time
Which of the following statements regarding tip income is true? A. If the taxpayer is an indirectly tipped employee (for example, a busser or bartender) he or s
What is −314×435 ? Write the answer as a mixed number in simplest form.
2. I invited Jeff to come for lunch but he wasn't hungry. (he / already / eat / lunch) ​
The length of a cinema hall is 20 m and breadth is 16 m. The sum of the areas of floor and flat roof is equal to the areas of four walls. Find the height of the