# Homework Help: PLEASE Can any one solve this problem

1. Aug 17, 2008

### spsundaram

A body dropped from a tower travels half of the total distance in the last second of its motion
.The total time taken of will be ...?
take g = 10 m/s^2

choices

a) square root 2 secs

b) 2 secs

c) 2+square root 2 secs

d) 2*square root 2 secs

2. Aug 17, 2008

### will.c

Do you know your basic kinematics formulas?

3. Aug 18, 2008

### dynamicsolo

You will need to write down the formula for the distance an object falls under gravity in a time t, in the absence of air resistance. You then need to make a comparison between

the distance 2D that the object falls in T seconds

and

the distance D that the object falls in 1 second .

You do not need to know the actual height of the tower, which we've called 2D, since you will be substituted for D using your second equation. This will give you enough information to solve for T, the total time of the fall. (You'll also find that we don't actually care what value g has...)