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 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
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
3K
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