Answer:
a. <u>position function of the coin:</u>
<u>Now the velocity function:</u>
b.
c. &
d.
e.
Explanation:
Given:
- height of dropping the silver dollar,
Given position function associated with free falling objects:
here:
initial height
initial velocity
time of observation
a)
<u>position function of the coin:</u>
∵the object is dropped it was initially at rest
<u>Now the velocity function:</u>
b)
we know average velocity is given as:
Displacement in the given interval:
Now,
c)
Instantaneous velocity at t = 3 s:
Instantaneous velocity at t = 4 s:
d)
At ground we have s=0:
Put this in position function:
e)
Velocity of the coin at impact: