If chris throws the baseball 60m to his friend in 4 s , who returns it in 6 seconds, what is the average speed of the baseball? what is the the average velocity?

(this is from a worksheet about speed and velocity)

not sure which average this is but one of the averges is 12.5 m/s^2... it's been a while since physics so I'm a little rusty

btw, to find this average you have to divide 60 by 4 to get 15m/s^2.

next you divide 60 by 6 to get 10m/s^2.

then you add 15 and 10 to get 25.

finally, you divide 25 to get 12.5m/ s^2.

Hope this helps!     15ms−1

Explanation:

average speed =(distance travelled) (time taken)

av. speed =604=15ms−1

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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explanation: