Is it possible for a body to have constant accelaration but zero velocity?If yes, give an example.?

Answer 1

A body kept at rest anywhere in the gravitational field of earth is having constant acceleration ( 9.8m/Sec^2) and zero velocity

Answer 2

I have to agree with The One Who Knows. The force of gravity is always present, but as long as the sum of all the forces acting on the body are zero (which is what happens when you are not moving) your acceleration is also zero. Review the second law of Newton, you'll see.

The answer to your question is no. If there is acceleration your velocity must change so it cannot remain constant. Notice that I am talking about the velocity, which is a vector. For circular motion, the speed remains constant (not zero though) but the velocity keeps changing as the vector rotates with the particle.

Hope that answers your question.

Answer 3

Acceleration is rate of change of velocity.

Whenever there is net and constant acceleration there is change in velocity.

As long as the constant acceleration acts on a body, the velocity not only increases but never stops increasing unless the acceleration is removed from the body.

For bodies falling under gravity, the speed immediately begins to increase from zero to any value unless it is stopped.

In fact, any object cannot change its state of rest unless acceleration is there.

But your question is not clear.

Is it possible for a body to have constant acceleration but zero velocity?

At the instant of applying a force on a body at rest and if the net force is other than zero, there is acceleration and the body immediately begins to change its speed.

A body cannot be at rest for ever when there is constant acceleration.

If a number of acceleration acts on a body in different directions and if and if only the net acceleration is zero, the body will be at rest.

For a body under rest on a table, the net acceleration is zero.

If a body starts its motion from rest, then there is always an acceleraion.

Answer 4

If a body were accelerating constantly from an initial negative velocity in a positive direction, at one instant its velocity will be zero.

But if you are asking for a situation where the body always has zero velocity, I can only propose that since acceleration involves change of speed and/or direction, a body at rest that is turning in place, is accelerating. It obviously still has a non-zero velocity in whichever direction it is instantaneously moving, but it's the best I can think of.

I didn't include gravitational acceleration because the question sounded to me more like one concerned with mechanics.

Answer 5

The answers about gravitational acceleration missed an important point that the body is at rest and is not moving. It may be subject to a gravitational force but it doesn't have the acceleration till it starts moving. So, while mathematically one can write g as the acceleration acting on it, if we take change of velocity as the criterion, it doesn't have an acceleration.

Answer 6

as properly to the different solutions you additionally could have consistent acceleration in say the X course with 0 velocity in the Y or Z guidelines. Say a motor vehicle accelerating alongside a lifeless straight away horizontal street has no velocity sideways or upwards.

Answer 7

only when its sitting still.

0.0 is a constant accel, and the velocity is 0. otherwise, no.
besides gravitional accel, however, even a body on the surface of the earth at rest is still moving at around 550 mph, (with the spinning of the earth.)