A 70 kg bicyclist rides his 9.8 kg bicycle with a speed of 16 m/s.
How much work must be done by the brakes to bring the bike and rider to a stop?

Hello,

✔ We have Ek = 1/2m x v²

In order to come to a complete stop, the cyclist must convert all his kinetic energy into thermal energy. Given that the braking force opposes movement, the work is therefore resistant, i.e.  W = -10 214.4 J.

answer: the correct answer for the fill in the blank is rods.

rods are the specialized photoreceptor cells that are present in the retina of human eye. they are responsible for vision in the night time ( also called scotopic vision). they have very low visual acuity and color distinguishing ability.

as they are responsible for vision in night time, therefore they are found predominantly in the nocturnal animals.