Acceleration of an object w/ mass vs. friction

AI Thread Summary
An object with a mass of 0.3 kg experiences a friction force of 0.2 N while sliding at an initial velocity of 2.7 m/s. To determine how long it takes to stop, the relevant equation F=ma can be applied, where the friction force serves as the force acting on the object. The discussion highlights the importance of understanding acceleration due to friction and the relationship between initial and final velocities. A participant initially struggled but ultimately realized they could use the friction force in their calculations. The conversation emphasizes the connection between force, mass, and motion in solving the problem.
Spaghett
Messages
3
Reaction score
0

Homework Statement


An 0.3kg object slides across a surface, experiencing a friction force of 0.2N. If its initial velocity is 2.7m/s, how long does it take to stop and how long does it slide for?


Homework Equations


F=ma


The Attempt at a Solution


I know I'm just missing a simple step or solution, but I'm just at a complete mental block right now.
 
Physics news on Phys.org
Spaghett said:

Homework Equations


F=ma

Maybe you'd want to consider conservation of energy instead as it is a bit easier?
 
What do you mean? I don't think i ever learned that
 
Spaghett said:
What do you mean? I don't think i ever learned that

Ah sorry, I didn't see that you need the time as well.

If you have the frictional force, what is the associated acceleration?

When the mass stops, what is the final velocity?

What kinematic equation do you know involves initial velocity, final velocity acceleration and time?
 
I figured it out guys, simple F=ma, just didn't know i could use the force of friction as F, thanks anyhow
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Friction, Mass and Acceleration: Analyzing Block Motion
Replies
6
Views
2K
How Does Friction Affect Acceleration on an Incline?
Replies
19
Views
3K
Finding the work done by a block
Replies
4
Views
3K
Friction and an object stopping
Replies
12
Views
2K
Calculating acceleration from the coefficient of kinetic friction
Replies
48
Views
8K
Calculating Kinetic Friction Coefficient for Sliding Soccer Player
Replies
13
Views
2K
Having a hard time learning Newton's 2nd law
Replies
5
Views
2K
Intuition on the direction of friction in a rotational dynamics problem
Replies
13
Views
2K
Does coefficient of kinetic friction depend on speed?
Replies
16
Views
5K
Finding the time it takes for two stacked blocks to travel
Replies
18
Views
3K

Hot Threads

Recent Insights

Back
Top