Answer:
15.71 m/s
Explanation:
circumference of the racetrack = 2πr
= 2πx50
= 314.16m
the circumference becomes the distance
speed= distance/time
= 314.14/20
= 15.71 m/s
kindly mark Brainiest
T is less than or equal to 19 N
0.45
C: 3
Cause of the colors