Pulling a sled across snow with a rope at an angle

[Purpleshinyrock]

Homework Statement

I need help understanding this exercise

Relevant Equations

dont know

Hello. Can someone tell me what area of phisics should I study to better understand this exercise and also what should I do to solve this exercise please?
A man pulls a small sledge with a force F ⃗ of intensity equal to 50.0 N and that makes an angle with the horizontal θ = 30º (see figure). The sled moves horizontally and the resistance that the snow offers to the movement of the sled results in a frictional force of intensity F a = 15 N. the sled has a mass of 20 kg. Determine:

a) the normal reaction to which the sled is subjected;

b) the resulting horizontal force on the sled;

c) the acceleration acquired by the sled;

d) the speed acquired by the sled after 10 s, assuming it started from rest.

(Use g = 10.0 m ∙ s -2 ).

 

[phinds]

Can someone tell me what area of phisics should I study to better understand this exercise and also what should I do to solve this exercise please?

Assuming you know trig, you just need classical mechanics.

 

[berkeman]

also what should I do to solve this exercise please?

With this type of problem, it is usually best to start by drawing a Free Body Diagram (FBD). So show us your FBD for the sled, and show us the equations that you write for it given the problem description and the questions...

 

[Lnewqban]

You will be able to solve that problem after studying Dynamics.
The following link discusses the actions of friction forces.
In case, some terms result confusing to you, please use "Previous" and "Next" buttons at the bottom of the pages.

https://courses.lumenlearning.com/physics/chapter/5-1-friction/

 

[Purpleshinyrock]

Thank You all for the answers and advice I used them to learn about the topic and solve the problem,
heres my answer:

 

[phinds]

heres my answer:

Illegible

 

[Purpleshinyrock]

Illegible

Is this better sir/maam?

 

[PeroK]

Is this better sir/maam?

It looks right. But, did you know that $14m/s$ is about $50km/h$? That's pretty fast for running backwards on snow.

 

[Purpleshinyrock]

woahh He must be very motivated (and maybe superhuman)