Force so the same amount of work

Iwill give brainliest if you answer right : )

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

What conclusion can be made based on the temperature of soil when the light hits the soil at 0°, 45°, and 90° angles in section 2 of the experiment? did your results support your hypothesis? why or why not?