Pulling a sled across snow with a rope at an angle

  • #1
Poster has been reminded to show their work on schoolwork problems
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:
Screenshot_2021-04-03 M23 - Fis_Qui_Aluno_int_ProvaModelo_vfinal pdf.png



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 ).
 
Last edited by a moderator:

Answers and Replies

  • #2
phinds
Science Advisor
Insights Author
Gold Member
17,291
8,692
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.
 
  • #3
berkeman
Mentor
60,880
11,270
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...
 
  • Like
Likes Purpleshinyrock and Vinh Nguyen
  • #4
Lnewqban
Gold Member
1,474
805
Last edited:
  • Like
Likes Purpleshinyrock
  • #5
Thank You all for the answers and advice I used them to learn about the topic and solve the problem,
heres my answer:
 

Attachments

  • Screenshot_2021-04-04 2020-11-11 18 32 Office Lens(1) pdf.png
    Screenshot_2021-04-04 2020-11-11 18 32 Office Lens(1) pdf.png
    93.7 KB · Views: 48
  • #7

Attachments

  • 2020-11-11 18 32 Office Lens(1).pdf
    515.1 KB · Views: 46
  • #8
PeroK
Science Advisor
Homework Helper
Insights Author
Gold Member
2020 Award
19,297
10,806
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.
 
  • Haha
Likes Purpleshinyrock
  • #9
woahh He must be very motivated (and maybe superhuman)
 

Related Threads on Pulling a sled across snow with a rope at an angle

Replies
2
Views
3K
  • Last Post
Replies
6
Views
10K
  • Last Post
Replies
6
Views
2K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
5
Views
5K
  • Last Post
Replies
3
Views
7K
  • Last Post
Replies
3
Views
4K
  • Last Post
Replies
4
Views
4K
Replies
5
Views
3K
Top