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

Magnesium has an atomic number of 12. what is the most stable charge for a magnesium ion?
Write -2x 2(-5x 2 +4x 3) in standard form.
The average of two numbers is 7. Find the numbers if three times one of the numbers is one half the other number. (Hint: write a system to determine the corre
Determining the source and motive of an ad for a health product will help you decide whether the ad is a reliable source or health information
I need help with this badly
Describe the events that occur at a neuromuscular junction
Read the sentence. I do not think the girls will be lost in the woods for too much longer. Which reading strategy is being described? A. Ask questions B. Ma
140 is 70% of what number
what types of situations might be modeled with equations containing two or more variables ?
what is the potential severity of the illnesses you are most susceptible to