Answer:
Acceleration = 5.714 meter per second²
Step-by-step explanation:
A ball has been thrown up with a speed of 20 meters per second.
After 3.5 seconds speed of the ball become zero that means ball attains it's maximum height after 3.5 seconds.
Now we have to calculate the average acceleration during the upward motion.
Since,
Acceleration =
= 5.714 meter per second²
A. 1 25/42
Step-by-step explanation: =-3 5/6 +5 3/7
= (-23/6)+ (38/7)
=(-161+228)/42
=-67/42
the explanaition of the answer and solution is in the picture, check it out. this is for question 14