Register to reply 
Confusion about force 
Share this thread: 
#1
Nov2313, 08:30 PM

P: 76

I have a confusion:
If we push an object of 10 kg with force of 60N once, does it accelerate constantly with 6m/s/s forever neglecting any resistance ? So, does this mean if this moving object collides with something the maximum force it applies is 60N? 


#2
Nov2313, 08:40 PM

P: 44

I probably shouldn't be answering stuff because I am new too. But I'll have a crack at it anyway.
P=mv where p is momentum and momentum is conserved. However you said it was only pushed once with 60N which makes me wonder if it would have a constant acceleration of 6m/s/s. I would have thought it would require a force acting on it to achieve constant acceleration. Otherwise it may have uniform motion of 6 m/s meaning 10kg multiplied by 6 which equals 60N. In that case yes it would hit something with 60N of force. But I am assuming this is a object in space with no resistance or opposing forces acting on it. 


#3
Nov2313, 10:08 PM

Mentor
P: 3,954

Repeat this calculation with something soft and squishy, so that it compresses by 10 centimeters, and you'll get a much smaller force. 


#4
Nov2413, 08:10 PM

P: 15

Confusion about force
For your first question, the answer is yes. It will constantly increase its speed but the rate of change of the speed is constant (acceleration is constant).



#5
Nov2413, 08:35 PM

P: 692




#6
Nov2413, 08:39 PM

P: 15

Yes you are right. I've just read it again. It's a bad thing from me not to read the word "once". In this case, Nugatory's answer is correct.



#7
Nov2513, 11:40 AM

P: 136

@Nugatory , isn't the force applied is 20000000 and not 12000000 because the mass is 10kg not 6 kg......!



#8
Nov2513, 12:15 PM

Mentor
P: 3,954




#9
Nov2613, 06:35 AM

PF Gold
P: 1,516

##F=\frac{mvmu}{t}## Where u=Initial velocity ,v= final velocity For example,Object was traveling at a constant velocity and has the same. It gets in contact with a wall or something,the force exerted is determined by the time taken for it to stop. 


Register to reply 
Related Discussions  
Extreme Confusion of centripetal acceleration force and normal force  Introductory Physics Homework  1  
Gforce equation confusion  Classical Physics  2  
Centripetal force confusion  Classical Physics  22  
My confusion regarding Force  Introductory Physics Homework  42  
Normal force confusion  Introductory Physics Homework  7 