• Support PF! Buy your school textbooks, materials and every day products via PF Here!

A block sliding up a ramp, solve for acceleration

  • Thread starter acid234
  • Start date
1
0
1. Homework Statement
A block is sent sliding up a 50 degree ramp at an initial speed of 9m/s. The coefficient of kinetic friction between the ramp and the block is 0.51. Find the acceleration of the block.


2. Homework Equations
Fk = (Fn)uk
F=ma


3. The Attempt at a Solution
umgsin50 = ma
ugsin50 = a
0.51(-9.8)sin50 = a
a = -3.829

Which is far from the right answer.
 
105
2
gravity! Think about if the block wasn't initially moving, would you know how to calculate its downward acceleration from gravity alone? The friction portion seems to be correct though.
 

rl.bhat

Homework Helper
4,433
5
Hi acid234, welcome to PF.
On the inclined plane, the retardation is caused by two factors. 1) Component of the weight along the inclined plane and 2) the frictional force. Find them
 

Related Threads for: A block sliding up a ramp, solve for acceleration

  • Posted
Replies
2
Views
4K
  • Posted
Replies
7
Views
5K
  • Posted
Replies
3
Views
3K
Replies
1
Views
2K
  • Posted
Replies
2
Views
1K
  • Posted
Replies
7
Views
6K
  • Posted
Replies
2
Views
5K
  • Posted
Replies
1
Views
3K

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top