A ball traveling at 3 m/s East hits a wall and bounces off heading West traveling at 2 m/s. If the change in direction took 0.4 second, what is the average acceleration of the ball?

A.) More information is needed
B.) 2.5 m/s^2 West
C.) 12.5 m/s^2 West
D.) 2.5 m/s^2 East
E.) 12.5 m/s^2 East

If there was no gravity then their would be no downword force on the football to have it return the the grownd, and if there was no friction (mainly air friction) then there would be no opposing force the stop the ball from moving through the air allowing the ball to travle ∞.

Sorry i don’t know what to do

Year  1936,  lehman predicted that the earths 'inner core' is solid. she observed that the seismic signals during her study were bent and did not pass through instead bouncing back. later it was confirmed that the earth's inner core was solid made up of nickel-iron and had a molten outer core.