Register to reply

Tension problem :/

by mrrocketknigh
Tags: cosine, physics, sine, tan, tension
Share this thread:
mrrocketknigh
#1
Oct27-10, 06:32 PM
P: 7
Here's the problem: A sledge loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope inclined at 20.0(degrees) above the horizontal. The sledge moves a distance of 20.0m on a horizontal suface. The coefficient of kinetic friction between the sledge and surface is 0.500. (a) What is the tension of the rope?


I don't know how to even start this problem, or how to find out what the tension is. Can anybody help me?
1. The problem statement, all variables and given/known data



2. Relevant equations



3. The attempt at a solution
Phys.Org News Partner Science news on Phys.org
What lit up the universe?
Sheepdogs use just two simple rules to round up large herds of sheep
Animals first flex their muscles
tiny-tim
#2
Oct27-10, 06:40 PM
Sci Advisor
HW Helper
Thanks
tiny-tim's Avatar
P: 26,148
hi mrrocketknigh! welcome to pf!

if the speed is constant, then the acceleration is zero, so Ftotal = ma tells us that Ftotal = 0

so draw all the forces on the sledge, and get them to add to zero
what do you get?
mrrocketknigh
#3
Oct27-10, 06:52 PM
P: 7
What do you mean by "draw all the forces on the sledge and get them to add to zero"? I'm lost.

mrrocketknigh
#4
Oct27-10, 07:06 PM
P: 7
Tension problem :/

Wait... is it 0??? I tried doing it myself this whole time, but to no avial...
tiny-tim
#5
Oct27-10, 07:14 PM
Sci Advisor
HW Helper
Thanks
tiny-tim's Avatar
P: 26,148
Quote Quote by mrrocketknigh View Post
What do you mean by "draw all the forces on the sledge and get them to add to zero"? I'm lost.
draw a diagram of the sledge, then draw all the forces on it
what are they?


Register to reply

Related Discussions
Problem with Tension Introductory Physics Homework 3
Tension problem help Introductory Physics Homework 7
Tension Problem! Introductory Physics Homework 24
Tension problem - HELP Introductory Physics Homework 12
Tension problem Introductory Physics Homework 2