When a ball is thrown straight up, by how much does the speed decrease each second?

Question

Physics....studying for a test, tommorrow.

Answer 1

It decreases by the acceleration of gravity
v(t)=v0-g*t
look at a delta of 1 seconds, where t2-t1=1

v1=v0-g*t1
v2=v0-g*t2

v2-v1=-g*(t2-t1)
since t2-t1=1
v2-v1=g

This is typical of any straight-line linear function. In this case, g is the slope of the velocity line in the vertical direction.
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