Register to reply

Object being pushed up an inclined plane

by Bushman
Tags: inclined, object, plane, pushed
Share this thread:
Bushman
#1
Dec14-05, 04:07 PM
P: 3
I can't figure out how to get the mass of this object, with the information given:

Inclined plane with angle relative to the ground of 20 degrees.

It takes 70 Newtons to get the object moving up the plane.

"Mu" of static friction: 0.35

All my example problems involve an object going down an inclined plane. I have been working on this problem all day, and just seem to get myself more and more confused. Any help would be appreciated.
Phys.Org News Partner Science news on Phys.org
Flapping baby birds give clues to origin of flight
Prions can trigger 'stuck' wine fermentations, researchers find
Socially-assistive robots help kids with autism learn by providing personalized prompts
andrewchang
#2
Dec14-05, 04:15 PM
P: 223
try drawing a free body diagram- the forces acting on the block are the push, friction, the normal force, and weight.
Bushman
#3
Dec14-05, 04:18 PM
P: 3
I have :(. I don't know the weight, only what I gave above. It seems to me like I need one more piece of information, such as the weight. That is why I posted here, to see if I was missing something obvious.

andrewchang
#4
Dec14-05, 04:26 PM
P: 223
Object being pushed up an inclined plane

well, you are solving for the weight, to get the mass.

you know that [itex] F_f = \mu N = \mu Wcos(\Theta) [/itex]
Bushman
#5
Dec14-05, 04:35 PM
P: 3
So that means:

Fsubf = 24.5

24.5 = mu x W x cosTheta

24.5/(mu x cosTheta) = W

Thank you so much, I did not recall that relationship between the Friction force and muN.


Register to reply

Related Discussions
Inclined plane Introductory Physics Homework 2
Object Traveling Up an Inclined Plane Introductory Physics Homework 6
How to solve for final velocity of object pushed by spring using concept of engergy Introductory Physics Homework 3
Inclined Plane Introductory Physics Homework 2
Force of Object on Inclined Place Introductory Physics Homework 1