Answer:b
Explanation:
velocity of a falling object increases.
so Kinetic energy of a falling object increases
height of a falling object from the ground decreases.
so the potential energy of a falling object decreases
Answer:
See below
Explanation:
Measure the distance and the amount of time to cover that distance
then speed = distance / time
Answer:
v = 8.403 m/s
Explanation:
Given that,
The current, 2019, women's world record for the 400-meter run around an oval track is held by Marita Koch, with a time of 47.60 seconds.
Average speed, v = d/t
d = 400 m
t = 47.6 s
So,

Hence, her average speed during the race is 8.403 m/s.