Table of Contents

## Can a body have an acceleration with zero velocity?

Yes, an object can have zero velocity and still be accelerating simultaneously. Then the object will start to move in the backward direction.

## Can the direction of velocity change when acceleration is constant?

1-Yes ,the direction of velocity can change while experiencing a constant acceleration. Like, in uniform circular motion there is a change in direction of the velocity and acceleration is constant in this case.

**Can you have zero speed and a non zero velocity?**

Can a particle in one- dimensional motion have zero speed and a non-zero velocity ? It is not possible because, velocity= speed + direction. If speed is zero velocity is also zero.

### Can you have a nonzero speed with a zero velocity?

No. It’s not possible. Speed is mostly, the magnitude of velocity. Any vector having zero magnitude cannot be non-zero.

### What is the meaning of zero velocity?

An object having zero velocity implies that it is stationary at a particular location. If we plot it on a velocity-time graph which represents velocity on the y -axis and time on the x -axis, it is represented by x -axis. Value of y (velocity), is 0 for all values of x (time).

**What is a non-zero velocity?**

A body in motion continues in motion (in the same direction, and with the same magnitude of velocity) ” unless acted upon by an outside force. Zero acceleration means no change in velocity, so if the velocity was nonzero, then it remains nonzero ” when there is zero acceleration (due to the absence of external force).

#### Can a body I have a constant velocity and still have a varying speed II in one dimensional motion have zero speed and a non-zero velocity?

No, since velocity=speed + direction , therefore a body can bot possess a constant velocity but a varying speed. Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.

#### What does non-zero velocity look like on a graph?

A velocity-time graph showing non-zero velocity and zero acceleration would be a horizontal line at any height except y=0. Sure. Zero acceleration merely means the velocity is not changing.

**What does acceleration look like on a velocity time graph?**

In a velocity-time graph, acceleration is represented by the slope, or steepness, of the graph line. If the line slopes upward, like the line between 0 and 4 seconds in the Figure above, velocity is increasing, so acceleration is positive.

## What is the equation for a velocity time graph?

time graph to determine velocity, we can use a velocity vs. time graph to determine position. We know that v = d/t. If we use a little algebra to re-arrange the equation, we see that d = v Ã— t.

## Can a body have constant speed and still accelerating give an example?

Yes, a body can have a constant speed and still be accelerating. For example you revolve a stone connected by a string in a circular motion. You will notice the stone rotates with a constant speed and yet have a centripetal acceleration which is directed towards the centre of the circle.

**Can a body move on a curved path without having acceleration?**

No, a body cannot move on a curved path without acceleration because while moving on a curved path, the velocity of the body changes with time.

### Can a body have a uniform speed but still have acceleration give example?

A body in uniform circular motion has uniform speed but at every point its direction of velocity changes, so its motion is accelerated. (ii) Yes, a body can have acceleration even when its velocity is zero. A driver of a car travelling at 52 km h“1 applies the brakes and accelerates uniformly in the opposite direction.

### Is there acceleration at constant velocity?

An object with a constant acceleration should not be confused with an object with a constant velocity. If an object is changing its velocity -whether by a constant amount or a varying amount – then it is an accelerating object. And an object with a constant velocity is not accelerating.

**Under what circumstances if any can an object move in circular path without being accelerated?**

Circular motion requires a net inward or “centripetal” force. Without a net centripetal force, an object cannot travel in circular motion. In fact, if the forces are balanced, then an object in motion continues in motion in a straight line at constant speed.

#### How do you describe the direction of the force?

To fully describe the force acting upon an object, you must describe both the magnitude (size or numerical value) and the direction. In contrast, 10 Newton, downward is a complete description of the force acting upon an object; both the magnitude (10 Newton) and the direction (downward) are given.

#### Why do objects stay in circular motion?

As the centripetal force acts upon an object moving in a circle at constant speed, the force always acts inward as the velocity of the object is directed tangent to the circle. For this reason, the kinetic energy and therefore, the speed of the object will remain constant.

**What is the force that keeps a body in circular motion?**

Any net force causing uniform circular motion is called a centripetal force. The direction of a centripetal force is toward the center of curvature, the same as the direction of centripetal acceleration.