(Find time it takes a block to travel) Dynamics

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Discussion Overview

The discussion revolves around calculating the time it takes for a block to travel 10 meters down a slope, starting from rest. Participants explore the application of Newton's laws, friction, and the geometry of forces acting on the block.

Discussion Character

  • Homework-related

Main Points Raised

  • One participant poses a question about determining the time for a block to travel a specified distance under the influence of gravity and friction, indicating the need for Newton's laws.
  • Another participant suggests drawing a diagram to find the weight components acting on the block, specifically the component acting perpendicular to the slope, which is multiplied by the friction factor to find the friction force.
  • A participant seeks clarification by asking if their diagram aligns with the suggested approach.
  • Another participant provides a link to an image that presumably illustrates the problem setup.
  • One participant emphasizes the necessity of resolving the weight into two components: one perpendicular and one parallel to the slope, indicating a potential gap in the previous contributions.

Areas of Agreement / Disagreement

There is no consensus yet, as participants are still exploring the problem and clarifying the necessary steps to approach the solution.

Contextual Notes

Participants have not yet established all assumptions, such as the effects of friction in detail or the specific equations to be used, leaving some mathematical steps unresolved.

wildleaf
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Homework Statement


How long would it take for the block to travel 10m starting from zero velocity? (i.e. T =?)
(Look the the attached picture for the block and the position of it on the plane at 45 degree and 10 m from ground with the same slope)

Theta = 45 degrees
m = 1.0 kg
f = 0.3 (Friction Factor)
L = 10 m

Homework Equations



The Attempt at a Solution



I know we have to use the Newton's law and we have to assume that v = 0 @ T = 0. But I do not how to do it.

Homework Statement


Homework Equations


The Attempt at a Solution

 

Attachments

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Draw a large diagram. Find the component of weight which acts perpendicularly to the slope. When you multiply this by 0.3 you have the friction force that acts along the slope.

That should get you started.
 
Is this what you mean (look at the attached picture).
 
You haven't drawn the triangle that resolves the weight into two components: one perpendicular to the slope, the other parallel to it.
 

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