Draw the direction and magnitude of all the forces acting on the block of mass

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Homework Help Overview

The discussion revolves around drawing free body diagrams for a block of mass m under various conditions: stationary on an incline, sliding down the incline, and sliding on a concave surface, all while considering frictional forces.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the forces acting on the block, including gravity, normal force, and friction. Questions are raised about the directions of these forces and the implications of the block's motion or lack thereof on net forces.

Discussion Status

Some participants have shared their work and are seeking feedback on its correctness. There is an ongoing exploration of the forces involved and their directions, with guidance provided on considering the nature of static and dynamic scenarios.

Contextual Notes

Participants are working under the constraints of homework rules, emphasizing the need for individual understanding and exploration rather than direct solutions. There is a sense of urgency expressed by some for timely assistance.

prabhjyot
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Free body diagrams
Draw the direction and magnitude of all the forces acting on the block of mass m when it is:
(a) Stationary on the incline
(b) Sliding down the incline with velocity, V
(c) Sliding on a concave surface with velocity, V.
All surfaces have friction.
 

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  • diagram1.GIF
    diagram1.GIF
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And what hae you done on the problem? No one is going to do your homework for you.
 
thats true but you didnt have to be so nasty about it, even though i can't talk, sorry
 
this is what I have done and am not sure its correct or not...I am confused...I need it today please check my work..
uploaded the work on this link..

http://www.uploadfile.info/uploads/50e7ebf4ec.gif
 
Last edited by a moderator:
prabhjyot said:
Free body diagrams
Draw the direction and magnitude of all the forces acting on the block of mass m when it is:
(a) Stationary on the incline
(b) Sliding down the incline with velocity, V
(c) Sliding on a concave surface with velocity, V.
All surfaces have friction.

Please describe the forces invovled - starting with gravity, which acts downward. Consider friction - in which direction does is it oriented?

If something is not moving, what does that tell one about the net forces?

What forces are normal? What forces are tangential?
 
please cjeck my work..?
http://www.uploadfile.info/uploads/dd0c7dcf1d.bmp
 
Last edited by a moderator:
prabhjyot said:
please cjeck my work..?
http://www.uploadfile.info/uploads/dd0c7dcf1d.bmp
I'm afraid these are incorrect. You have all the forces involved; weight, the normal force and the frictional force, now you must determine in which direction they are acting. As Astronuc said, gravity always acts down, that is straight down vertically. In which direction is the normal force always directed? In both cases in which direction to friction act?
 
Last edited by a moderator:

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