Question

Is it possible to have zero acceleration but non-zero velocity at some instant in a motion?

Answer 1

Yes. If net force is zero.

Answer 2

what are net force? What do you mean?

Answer 3

Net Force is the sum of forces acting on a body.
Since:
\[F_{NET}=m*a\]
and
\[F_{NET}\alpha A\]
we can say that if Net Force is 0, Acceleration is zero. And, because we know:
R is the displacement vector, and:
R'(t) = V(t)
R''(t) = A(t)
we can suppose a case where:
A(t) = 0
and find our velocity from:
\[\int A(t) dt=\int0dt=C_{1}\]
where C is our integration constant. meaning that our velocity is some constant value. From this we can also find the displacement from:
\[\int V(t) dt=\int C_{1}dt= C_{1}t+C_{2}\]
making this a linear equation for R(t) which makes sense... constant velocity = linear displacement.

Answer 4

I'm so sorry but I have no idea what you just put above D:

Answer 5

Basically, the answer is yes. It happens when the sum of all the forces acting on an object is 0.

Because the relation between Force and acceleration, and acceleration and velocity.
I used calculus to show this, because it is quicker and easier than any other method.

Answer 6

The short answer is yes because force leads to acceleration of an object. However, if the object is already moving--i.e., has some velocity--then with no force acting on it, it will continue to keep moving.

Perhaps the easiest analogy is on a billiard table, with negligible friction. You hit a ball; it accelerates; then it starts to move with constant velocity even though there no longer any force applied to it.

Answer 7

You should consider reviewing Newton's First Law (law of inertia):

http://science.howstuffworks.com/science-vs-myth/everyday-myths/newton-law-of-motion1.htm

Answer 8

yes, it's possible.. if the velocity is constant , the acceleration is zero.