Practice Test: Mr Rogers AP Physics C -- Friction

Unit Plan Practice Test Study Guide
   

Online Quiz - Friction                                                             Q10C3-4F07

     
   

AP Physics Friction Practice Test

     
1 ) A block of mass = 2M is stacked atop a block of mass = M. The sliding COF between the blocks = 0.8 and between the lower block and floor is 0.1. A force = F is applied to the top block parallel to the ground. Find the acceleration of the lower block.
     
2 ) Find the acceleration of a box of mangos sliding down a slope of 40 degrees. Assume the dynamic COF = 0.2 and the static COF = 0.3. Would doubling the number of mangos in the box have any effect on the acceleration?
     
3 ) If the above box of mangos rests on a 20 degree slope, will it slide?
     
4 ) Find the static COF if the box of mangos starts to slide if the angle of the slope =  30 degrees. 
     
5 ) The tires on Martha's 4WD SUV  have a static COF = 0.7 and a dynamic COF = 0.5 with the road surface. What is her maximum acceleration and minimum stopping distance if her SUV's velocity is 40 m/s?
     
6 ) If Martha's SUV is only 2WD, what is the effect on her maximum acceleration (speeding up) and minimum stopping distance (slowing down)? Assume the static COF's are the same for all wheels and that the car's mass is evenly distributed (half over the front tires and half over the back tires).

 

7 ) Juan pushes downward on a box of mass = M with a force = 2Mg that makes a 45 degree angle with the horizon. By contrast Susan pulls upward on a similar box with a similar force and angle. Both boxes sit on a surface with a sliding COF = 0.2 and a static COF = 0.3. Find the acceleration of both boxes.
     
   

Answers

Mr

SAM Team--Southside High School's STEM and Computer Science extra-curricular club (Mr. Rogers Sponsor)

Mr. Rogers' Twitter Site

Mr. Rogers Teacher's Blog

Mr. Rogers T-shirts

Mr. Rogers Information for Teachers

Mr. Rogers Science Fair Information

Check out other web sites created by Mr. R:

Check out Articles by Mr. Rogers:

 
Insultingly Stupid Movie Physics is one of the most humorous, entertaining, and readable physics books available, yet is filled with all kinds of useful content and clear explanations for high school, 1st semester college physics students, and film buffs.

It explains all 3 of Newton's laws, the 1st and 2nd laws of thermodynamics, momentum, energy, gravity, circular motion and a host of other topics all through the lens of Hollywood movies using Star Trek and numerous other films.

If you want to learn how to think physics and have a lot of fun in the process, this is the book for you!

 

First the web site,

now the book!


Mr. Rogers Home | Common Sylabus | AP Comp Sci I | AP Comp Sci II | AP Physics Mech | AP Physics E&M | AP Statistics | Honors Physics|IB Design Tech | Southside

[ Intuitor Home | Physics | Movie Physics | Chess | Forchess | Hex | Intuitor Store |

Copyright 1996-2011 T. K. Rogers, all rights reserved. Forchess is a registered trademark of T. K. Rogers.
No part of this website may be reproduced in any form, electronic or otherwise, without express written approval.