Hi,(adsbygoogle = window.adsbygoogle || []).push({});

I've spent a long time and wasted lots of paper on this question. It might be very easy to do but I have tried/used every one of the motion formulas and don't seem to get a right answer. This is one of those challenge question that our teacher has given us. He hasn't worked out the answer himself yet but one of the student who was able to get it says the answer is about 172.5m

Please could help me out with this Motion problem. Appreciate all the help. thnx

A hiker sees a boulder drop from the top of a cliff and notices that it takes 1.5seconds for the boulder to fall the last 1/3 of the way to the ground. What is the height of the cliff (in meters)?

here is a rough pic I drew:

http://www.clubbersnation.com/math/physics_problem.jpg [Broken]

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Please help with Motion Problem, looks easy but is confusing (to me)

**Physics Forums | Science Articles, Homework Help, Discussion**