Solving for Acceleration on an Inclined Ramp

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In summary, the conversation discusses the motion of a 1kg weight on a ramp inclined at 20 degrees and being pulled upwards and to the left. The question is whether the equation for this motion should be -ma or +ma. The speaker suggests looking at the forces in the X and Y directions and defining a coordinate system. They also mention that acceleration could be either -ma or +ma depending on the coordinate system. The conversation ends with the speaker expressing frustration and giving up on finding a simple answer.
  • #1
SS2006
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I have a 1kg weight on a rmap inclined 20degrees being pulled upwards and to the left
*******-
***********-
************** -
******************-
in that motion above(look at dashes only), is it -ma or +ma?
so the equation is

-a = t - mgsin20
or
a = t - mgsin20
I am just wondering if a leeft movement has anythign to do with gravity (A) being + or-
thanks
 
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  • #2
try looking at it in terms of the forces acting in the X direction and the forces acting in the Y direction. Consider where you place your origin.

Then think about which vectors will be positive and which will be negative.
 
  • #3
no no i just want a simple anaswre
i just meant weather acceleration should be -ma or +ma
 
  • #4
It has to do with how you define coordinate system.
 
  • #5
i have an exam tomorrow and i just wanted to know , are you saying there's no way to tell from the info i sent?
*sigh* nvm..
 

FAQ: Solving for Acceleration on an Inclined Ramp

What is acceleration on an inclined ramp?

Acceleration on an inclined ramp refers to the rate of change of velocity of an object as it moves along a ramp that is not horizontal. It is affected by the angle of the ramp and the force of gravity.

How do you calculate acceleration on an inclined ramp?

To calculate acceleration on an inclined ramp, you can use the formula a = (g*sinθ)/(1+sin^2θ), where a is acceleration, g is the acceleration due to gravity, and θ is the angle of the ramp.

What is the difference between acceleration on an inclined ramp and on a flat surface?

The main difference between acceleration on an inclined ramp and on a flat surface is the presence of an additional force, the component of gravity that acts parallel to the surface of the ramp. This force affects the acceleration and must be taken into account in calculations.

How can you determine the angle of an inclined ramp?

The angle of an inclined ramp can be determined by using a protractor or by measuring the rise and run of the ramp and using the formula θ = tan^-1 (rise/run). Alternatively, the angle may be given in the problem or measured using a device such as a clinometer.

What factors affect the acceleration on an inclined ramp?

The acceleration on an inclined ramp is affected by the angle of the ramp, the force of gravity, and the presence of any other forces such as friction or air resistance. The mass and shape of the object moving along the ramp may also affect the acceleration.

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