Answer:
What is the elapsed time for Trial B? - 3.0
What is the average speed for Trial B? - 1.3
Explanation:
To solve this problem we will resort to the concept of angle of incidence and refraction.
Since it is a reflection on a mirror, the angle provided for refraction will be equal to that of the incidence, that is, 25 °
The angle of reflation is always perpendicular to the surface so it is necessary to find the angle with respect to it.
Therefore the angle of the reflected beam of light made with the surface normal is 65°
B.
The original energy is mgh. The final energy is 1/2 mv^2.
The energy that is not converted to kinetic energy is the work done against resistive forces, which is mgh - 1/2 mv^2.
The answer to your question is true