Hi, I'm having a bit of trouble with a problem..(adsbygoogle = window.adsbygoogle || []).push({});

basically the question is as follows:

A particle falling covers 64% of the entire height in its last second of the fall. What is the total height of the fall?

I've tried equating two formulas, and a few other things but I can't seem to go anywhere. Any help would be appreciated.

I also need clarification on something.. My teacher said that on a position-time graph, that if there is a portion that has constant velocity (ie, no curve but a straight line), that you can't have instantaneous velocity since you can't draw a tangent to a point.. but I was under the impression that instantaneous velocity was just the velocity and any given point of time?

Thanks!

**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!

# Homework Help: Some physics help needed

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