Uniform circular motion describes the motion of a body traversing a circular path at constant speed. Since the body describes circular motion, its distance
from the axis of rotation remains constant at all times. Though the body's
speed is constant, its velocity is not constant.
(1) What is the distance travelled by the object if it goes a complete round in a
circular path of radius 50m?
(II) What is the displacement in the above situation?
(iii) Calculate the speed of the object if it takes 20sec to complete a round.
(iv) Calculate the average speed after completing 3 rounds.
PLEASE HELP

answer: i'm not sure which is which for i get confused on it all the time but i can tell you that the answer lies with the convex and concave devices. i hope this you. have a good day and best of luck to you!

explanation:

we need to know the time interval during which the force acts. impulse of force = momentum change

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.