robinsonlove218 robinsonlove218
  • 03-05-2019
  • Physics
contestada

A train traveling at 7.55m/s accelerates to a distance of 975m in 31.5 s. Whats the final velocity of the train?
A)227m/s
B)54.4
C)7.61
D)69.5

Respuesta :

jamuuj jamuuj
  • 03-05-2019

Answer:

B. 54.4  m/s

Explanation:

Using the equation;

S = ut + 1/2at²

Where;

v is the final velocity

u is the initial velocity,

a is the acceleration,

s is the displacement

Therefore;

975 =(7.55×31.5) + (0.5×a× 31.5²)

975 = 237.825 + 496.125a

496.125a = 737.175

a = 1.486 m/s²

But;

v = u + at

  = 7.55 m/s + (1.486 × 31.5)

   = 54.355 m/s

   = 54.4 m/s

Therefore;

The final velocity is 54.4 m/s

Answer Link

Otras preguntas

At a restaurant, Devon and his six friends decided to divide the bill evenly. If each person paid $10 then what was the total bill?
The first three steps in determining the solution set of the system of equations algebraically are shown. y = x2 − x − 3 y = −3x + 5
Carol is baking cookies and needs 2 1/4 cups of flour 2/3 cup of white sugar, 1/4 cup of brown sugar, and 1/16 cup of baking soda. Use this information to answe
The sentence 3 + (5 + 2) = (5 + 2) + 3 illustrates
define right to information?​
Identify three ways to build parenting skills
Successful public speaking is more likely due to intuition and natural ability than planning and forethought True False
1. Give an example of a positive emotion, a negative emotion, and a neutral emotion. Then give an example of how a game can make you feel each of these emotions
Which element is found in all organic molecules?
Name the sides of angle four Line DG Line DF Line DE Line DH Line DC