A car increases its velocity uniformly from 20m/s to 40m/s in 2 minutes. Can you solve for its average velocity?

Explanation:

If velocity is increasing uniformly with time, this means the acceleration is constant. So we can use this formula,

Initial Velocity+Final Velocity/2.

Our total Velocity is 60 m/s. Let convert minutes to seconds, which is 120 seconds so we get

60m/s/120 s which we get 0.5 m/s.

Average velocity is 0.5 m/s^2.

The speed at the beginning is 20 m/s.

The speed at the end is 40 m/s.

The average speed is 1/2(20 m/s + 40 m/s)

That's  30 m/s .

The length of time for the change doesn't matter, as long as the change is uniform.

v 154.9= 0.9 length length s little over 154.9cm

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.