Answer:
The initial velocity of the cart was 0.91m/s.
Explanation:
When the car comes to a stop it has delivered all of its kinetic energy to the spring; therefore,
solving for 
we get:
we put in 
, 
, and 
to get:
Work formula is Work=N∙M or Joule (J)
So you have the following given:
50 000 is the output work
.8 is the efficiency
if you input the given = 50000 = .8*J
To get the answer just divide 50000 by .8 to get the answer.
62,500 J is the amount of work to be done.
A. red, is the correct answer. A red filter only lets red light through, whether white or red light passes through it.
Hope this helps, and have a great day!
1.Epithelium- lines and covers surfaces
2. Connective tissue- protect, support, and bind together
3. Muscular tissue- produces movement
4. Nervous tissue- receive stimuli and conduct impulses
Hope i helped u :)
