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## Homework Statement

A certain freely falling object, released from rest, requires 1.65 s to travel the last 39.0 m before it hits the ground.

(a) Find the velocity of the object when it is 39.0 m above the ground. (Indicate the direction with the sign of your answer. Let the positive direction be upward.)

(b) Find the total distance the object travels during the fall.

## Homework Equations

v=v°+at

a=v-v°/t

distance Δx=vavg(t)

## The Attempt at a Solution

a) To find the velocity I am simply using the velocity formula, and making a=-9.8 because it is falling down.

v=0+1.65s(-9.8)=-16.17m

When I put -16.17 into the answer online it response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error.

I also tried -16.2, but before I use another try (I only have 3 left) I wanted to make sure that I am close to the answer, so I can try rounding to 16m/s.

b) I am confused on this one but I got 47.1m and it tells me the same thing, that I am within 10% of the correct value.