# coefficient of frictionWatch

Announcements
#1
I'm stuck on a question in which we are given three values: mu= 0.3

initial velocity = 7m/s and that it travels 2m . The question asks me to find the speed at the end of the 2m . I havent really got my head around friction yet and was wondering if anyone could point me in the right direction for this?

ive understood the normal force = 9.8 m and that the max friction force is 0.3 x9.8m but dont see how either of these would help?
0
5 years ago
#2
(Original post by santeria133)
I'm stuck on a question in which we are given three values: mu= 0.3

initial velocity = 7m/s and that it travels 2m . The question asks me to find the speed at the end of the 2m . I havent really got my head around friction yet and was wondering if anyone could point me in the right direction for this?

ive understood the normal force = 9.8 m and that the max friction force is 0.3 x9.8m but dont see how either of these would help?
You just have to apply the formula F=ma to get the deceleration of the mass where F is the expression you have written. m cancels.

When you have a, you can apply a suvat equation to find v, given u, s and a here.
0
X

new posts
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### University open days

• SOAS University of London
Wed, 29 May '19
• University of Exeter
Thu, 30 May '19
• Cranfield University
Cranfield Forensic MSc Programme Open Day Postgraduate
Fri, 31 May '19

### Poll

Join the discussion

Loved the paper - Feeling positive (221)
22.97%
The paper was reasonable (430)
44.7%
Not feeling great about that exam... (174)
18.09%
It was TERRIBLE (137)
14.24%