The first one is A and the second one would be C
The average speed is 52km
Answer:
2 seconds
Explanation:
if a ball travels 1/2 meter per second, and there's 2 halfs in a whole, 1/2 meter per second x 2 halfs in a whole meter is 2 seconds to travel a meter
law of conservation of energy
aka the first law of thermodynamics
