Banked Curves and Conical Pendulums

Steps to Solve

• (Draw a picture)• Construct the FBD• Sketch the components of the appropriate

force• Write both 2nd Law Equations– (SFy=may & SFc = mS2/r)

• Substitute and Solve• (What did I forget???)

EX 1

• At what angle (relative to horizontal) should an on-ramp be banked if it has a radius of 50m and drivers should be able to maintain a speed of 10 m/s without needing friction to negotiate the turn?

Assignment

• p 134 P# 40, 43, 47, 49

Lab - Objective: World Domination!!!

Objective:

• Use a CONICAL PENDULUM to determine g (the acceleration due to gravity)– Derive an equation that will be of the form g= …– Determine what measurements must be taken– Present your findings to Dr. Evil!

Mwuhahaha….MWUHAHAHAHA…hahahaha….

Review Questions, Problems

• P 76 Q#11-13• P130 Q#10, 11• P134 #36, 46; p 138# 87, 88, 89