Sled placed at an inclined plane ( Newtons law)

[lovemake1]

Homework Statement

* This is for my project.
The sled is placed at an inclined surface at an angle of theta. The sled is attatched to a rope, which i will be pulling to find out the minimum force to start the sled moving.
i would assume that when I am tryin to find the jusssttt jussst that point when it starts to move will i make Fnet = 0 ?

im finding out different amount of tensions needed to pull the skier up depending on the angles. i will be increasing the the angle by 15 degrees every interval. starting from 30 degrees.

--Im open to hear any opinions regarding my project, if you know that there is a way i could make it little bit more complex and interesting ? i will be very glad to hear them--

Homework Equations

Fnet = ma

The Attempt at a Solution

I know that when a mass of object is placed at an angle there is a
friction force, x-component of the gravity. These two forces appose the Tension force.

Ftension - Ffriction - Fgravityx = m a

would acceleration be 0 in this case?

so it would be Ftension = Ffriction +Fgravityx
but if it wants to move Ftension > Ffriction + Fgravityx right??
please HELP !

 

[ideasrule]

Acceleration would be 0 at the moment before the sled starts moving. Once it starts moving, acceleration is no longer 0 and the force of friction decreases significantly because it will then be kinetic friction, not static friction.

 

[kerimek]

I would like to commend you for your project and your curiosity to make it more complex and interesting. It shows a great attitude towards learning and experimentation.

In terms of your question, you are correct in your understanding of the forces involved in this scenario. The tension force from the rope must be greater than the combined forces of friction and the x-component of gravity in order for the sled to start moving. This is because the sled needs a net force in the direction of motion in order to accelerate.

To make your project more complex and interesting, you could consider changing other variables such as the mass of the sled, the type of surface the sled is on, or the angle of the incline. You could also explore how changing the tension force affects the acceleration of the sled. Additionally, you could try to make predictions based on your understanding of Newton's laws and then test them through experimentation. This will help you develop your critical thinking and problem-solving skills as a scientist. Good luck with your project!