Answer:
They are equal
Explanation:
angle of incidence = angle of reflection
watts = work per second.
work is mgh = 3x10x50=1500
watts out = 1500
Watts used = 2000
eff=1500/2000=75%
Answer:
Both cyclists have a displacement (vector) of 546.41 m
V(velocity) = 546.61 / 30 = 18.2 m/sec
Cyclist x travels 600 m / 30 = 20 m/sec average speed assuming 20 sec over each 200 m interval (total displacement of X = 600 m)
Cyclist Y travels 546.61 m / 30 = 18.2 m/s average speed