The graph represents velocity over time.

a graph with horizontal axis time (seconds) and vertical axis velocity (meters per second). a line runs from 0 seconds 2 meters to 100 seconds 22 meters.

what is the acceleration?

–0.4 m/s2
–0.2 m/s2
0.2 m/s2
0.4 m/s2

0.2ms^{-2}

Explanation:

acceleration can be taken as the gradient of a velocity - time graph

let the points be (0,2) (100,22)

Explanation:

As we know that rate of change in velocity is given as acceleration

Here we know that

here we know that

now we have

i think it's 35 meters

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.