How to find velocity given coefficient of friction, distance, mass and v1?

Click For Summary
SUMMARY

The discussion focuses on calculating the final velocity (v2) of an object sliding on a surface with a coefficient of friction (μ) of 0.2, an initial velocity (v1) of 50 m/s, a distance (d) of 3 m, and a mass (m) of 100 kg. The relevant equations include the frictional force (F = μ * normal force), work done (W = Fd), and the relationship between work and kinetic energy (W = ΔK). The solution involves determining the work done against friction and applying it to find the final velocity using kinetic energy principles.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with the concepts of kinetic energy and work
  • Knowledge of friction and its coefficients
  • Basic algebra for solving equations
NEXT STEPS
  • Study the derivation of the work-energy principle
  • Learn about calculating frictional forces in different scenarios
  • Explore the relationship between initial and final velocities in motion equations
  • Practice problems involving kinetic energy and work done against friction
USEFUL FOR

Students studying physics, particularly those focusing on mechanics, as well as educators looking for examples of applying friction in motion problems.

Ingrid44
Messages
1
Reaction score
0

Homework Statement



calculate the final velocity of an object sliding across a surface with a coefficient of friction of 0.2, a distance of 3m, an initial velocity of 50m/s and the object's mass of 100kg.
μ=0.2
v1= 50m/s
d=3m
m=100kg
v2= ?

Homework Equations


I know
F= μ*normal force (mg)
Kinetic Energy= 1/2mv^2

The Attempt at a Solution


I am confused and can't see how to get to the answer. Sorry, its been long since I took physics, I will really appreciate some help. Just the process of getting there. THANK YOU :)
 
Physics news on Phys.org
Here are a couple more equations for you:

W = Fd

W = \Delta K
(K is kinetic energy)

Does that help?
 

Thread 'Magnitude of buoyant force in fluids of different densities'

The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?
View full post »

Similar threads

Why do I keep getting friction coefficient as a negative?
  • · Replies 17 ·
Replies
17
Views
3K
Coefficient of Friction question for a cart going down a wooden ramp
  • · Replies 18 ·
Replies
18
Views
3K
Finding the work done by a block
  • · Replies 4 ·
Replies
4
Views
3K
How to find coefficient of friction *Without* mass?
  • · Replies 3 ·
Replies
3
Views
22K
Static friction coefficient for a crate in the back of a truck
  • · Replies 6 ·
Replies
6
Views
2K
Find friction coefficient given initial and final velocity
  • · Replies 3 ·
Replies
3
Views
3K
Calculate the coefficient of friction from mass and angle
  • · Replies 5 ·
Replies
5
Views
8K
Physics homework help needed -- A mass sliding down a ramp with friction
  • · Replies 14 ·
Replies
14
Views
3K
Variable friction on an inclined plane and maximum velocity
  • · Replies 33 ·
2
Replies
33
Views
4K
Three-pulley system and coefficients of friction
  • · Replies 7 ·
Replies
7
Views
2K