Velocity and Acceleration understanding

AI Thread Summary
If an object's velocity is zero, its acceleration can also be zero under specific conditions. When a body is at rest and no external forces are acting on it, both velocity and acceleration are zero, in accordance with Newton's laws. However, if a body is decelerating and approaches zero velocity, it can still have a non-zero acceleration until it fully stops. The distinction lies in the state of the object; at rest with no forces, acceleration is zero. Understanding these nuances is crucial for grasping the relationship between velocity and acceleration in physics.
mrserv0n
Messages
18
Reaction score
0
If somethings velocity is 0 can the acceleration be 0? If so why?

I have been trying to answer this and it seems I come up with different opinons from the text to the internet.

Which is it??
 
Physics news on Phys.org
A body is deccelerating, then its velocity starts tending to zero. Agreed. Then after sometime the velocit would reach zero, I mean the instantaneous velocity, But the decceleration might continue and hence the instantaneous acceleration is not 0.
 
However, if a body is at rest (v=0) and no external force is acting, then by Newton's first and second laws the acceleration must also be zero (f=ma). Therefore, yes it is possible but only if the body is at rest.
 
Thanks for the insight my fellow physics friends.
 
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »
Thread 'A cylinder connected to a hanged mass'

Thread 'A cylinder connected to a hanged 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

Acceleration of a ball at its max height after being thrown upwards
Replies
11
Views
666
Why would this be accelerating positively?
Replies
6
Views
905
Bead on a rod which is being pulled by an ideal string with velocity v
Replies
27
Views
931
Terminal velocity and acceleration
Replies
7
Views
881
Calculate the Acceleration of this Car
Replies
7
Views
920
A or B? Increase in Velocity Backwards & Acceleration Forward
Replies
19
Views
2K
Relation between Friction, Velocity, and Acceleration
Replies
16
Views
915
Solve Angular Velocity & Acceleration - Dimensional Analysis
Replies
3
Views
2K
Query related to Two-Dimensional Motion
Replies
9
Views
1K
Solving for Work Done When Accelerating a Mass
Replies
3
Views
709

Hot Threads

Recent Insights

Back
Top