Superman is flying 54.5 m/s when he sees a train about to fall into a river 850 m away. he reaches the train in 4.22 s. what is his final velocity?

348.34 m/s. When Superman reaches the train, his final velocity will be 348.34 m/s.

To solve this problem, we are going to use the kinematics equations for constant aceleration. The key for this problem are the equations and where is distance, is the initial velocity, is the final velocity, is time, and is aceleration.

Superman's initial velocity is , and he will have to cover a distance d = 850m in a time t = 4.22s. Since we know , and , we have to find the aceleration in order to find .

From the equation we have to clear , getting the equation as follows: .

Substituting the values:

To find we use the equation .

Substituting the values:

the answer for apex is the lowest

0 = 0.40 / 0 = 0

= 0.20 = 9.80 ⁄2 =?

=0 , = = 0.20 =0.50 0 0.40 ⁄

=0−122 =0−12(9.80 ⁄2)(0.50)2 =1.2