- 208

- 1

**1. Homework Statement**

5. An object is thrown vertically upwards with a speed of 72 kilometres per hour. How long does it take to reach a point 25 meters below the starting point? You can take g as 10 ms-2 for convenience.

Here is my answer. I got 4 yet the answer is 5.

http://i.imgur.com/Ewvwh.jpg

http://i.imgur.com/ynVmM.jpg

http://i.imgur.com/OBVsX.jpg

Am I correct?

**1. Homework Statement**

**2. Homework Equations**

**3. The Attempt at a Solution**

Last edited by a moderator: