|Jul14-10, 10:01 AM||#1|
How do I figure out the initial velocity of an object?
1. The problem statement, all variables and given/known data
Hi, I need to figure out the initial velocity if an object of 1400 kilograms is subjected to a friction coefficient (sliding friction) of 0.4587 for 75.6 metres, and its final velocity after being subjected to that friction is 23.05 metres per second. How do I go about this?
2. Relevant equations
The only equations that I can think of that are relevant is:
3. The attempt at a solution
Friction force= Fr=μmg
Final Kinetic energy
I'm not sure how to do the distance equation as I don't know the amount of time.
|Jul14-10, 10:07 AM||#2|
Blog Entries: 1
Two ways to go:
(1) Use kinematics. Use Newton's 2nd law to find the acceleration and combine that with some kinematic equations. (Look for a kinematic relationship that includes distance and velocity.)
(2) Use energy. What's the work done by that friction force?
FYI: KE = ½mv², not ½mv.
|Similar Threads for: How do I figure out the initial velocity of an object?|
|Initial Velocity of a falling object||Introductory Physics Homework||33|
|The object at rest has an initial velocity >0?||Introductory Physics Homework||2|
|Initial velocity of an object||Introductory Physics Homework||2|
|How can I find initial velocity of an object||Introductory Physics Homework||0|
|Calculating initial velocity for object....||Introductory Physics Homework||2|