(adsbygoogle = window.adsbygoogle || []).push({}); HELP!! Projectile motion and Force puzzler!!

A 10.8 kg box is 5.0 m from the edge of a 12.96 m high cliff. Bob pushes the box over the edge of the cliff by applying a constant horizontal force to it until the box goes over the edge. The force of friction on the box is 49.0 N and the box lands 7.5 m from the base of the cliff. How much force did Bob apply to the box while he was pushing?

What am i supposed to do... I know I'm supposed to work backwards...which is what I did. I found the velocities in the vertical and horizontal directions...what do I do now?!

**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: HELP Projectile motion and Force puzzler

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