Table of Contents

## Can an object have zero acceleration when it is moving explain your answer with examples?

Give examples. Yes. Anytime the velocity is constant, the acceleration is zero. For example, a car traveling at a constant 90 km/h in a straight line has nonzero velocity and zero acceleration.

## What is an example of zero acceleration?

No acceleration means no change in velocity. For example an apple thrown in space. A photon has zero acceleration because it can’t be accelerated. All other examples of zero acceleration are where the thing is moving at a constant velocity relative to an inertial reference frame.

**What happens when acceleration is zero?**

If acceleration is 0, the velocity is not changing. If the velocity is constant (0 acceleration) then the object will continue without slowing down or speeding up.

### What if the acceleration of an object is equal to zero?

When acceleration is zero (that is, a = dv/dt = 0), rate of change of velocity is zero. That is, acceleration is zero when the velocity of the object is constant. Motion graphs represent the variations in distance, velocity and acceleration with time.

### Does constant speed mean acceleration is zero?

An object’s acceleration is the rate its velocity (speed and direction) changes. Therefore, an object can accelerate even if its speed is constant – if its direction changes. If an object’s velocity is constant, however, its acceleration will be zero.

**Can acceleration be non zero when velocity is zero?**

It is possible to have a non-zero value of acceleration when the velocity of a body is zero. Therefore, the body is still accelerating.

#### Can a body have 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 a body have zero velocity and finite acceleration?

This acceleration is the gravitational acceleration. At that point the component of acceleration/gravitational acceleration works there. So, at the topmost point the velocity is zero but acceleration is not and has a finite value. Therefore, a body can have zero velocity and finite acceleration.

**Can a body have a constant speed and still have a varying velocity?**

No, a body can not have its velocity constant, while its speed varies. Rather, it can have its speed constant and its velocity varying. For example in a uniform circular motion.

## What do you understand about negative acceleration?

According to our principle, when an object is slowing down, the acceleration is in the opposite direction as the velocity. Thus, this object has a negative acceleration. When an object is speeding up, the acceleration is in the same direction as the velocity. Thus, this object also has a negative acceleration.

## Can the direction of velocity of a body change when its 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.

**Is direction of acceleration same as velocity?**

Acceleration is a vector in the same direction as the change in velocity, Î”v. Keep in mind that although acceleration is in the direction of the change in velocity, it is not always in the direction of motion. When an object slows down, its acceleration is opposite to the direction of its motion.

### Can an object with constant acceleration reverse its direction?

Answer: Yes, an object with constant acceleration reverses its direction of travel. This can be explained by considering following example. Example: A body thrown to upper direction will change its direction after reaching the maximum height, but the acceleration due to gravity is always constant in this situation.

### Can an object have an eastward velocity experiencing a westward acceleration?

Yes, it possible, in this case – ve acceleration known as retardation. Answer: An object can have an Eastward velocity while experiencing a Westward acceleration. The car will slowly stop as there will be a decelerration or in other words, an acceleration Westward.

**What is westward acceleration?**

Accelerating objects have a changing velocity – either due to a speed change (speeding up or slowing down) or a direction change. A car moving eastward would be described as having an eastward velocity. And a car moving westward would be described as having a westward velocity.

#### Can a boat moving eastward accelerate to the West?

Originally Answered: can an object have eastward velocity experiencing a westward acceleration? Yes. An object headed east, undergoing a positive westward acceleration, is slowing down. A positive acceleration in one direction is the same as a negative acceleration in the opposite direction.

#### Can an object have a westward acceleration while moving northward?

A westward acceleration while moving northward? Yes, an object can be moving at the same time that it is also slowing down. During this period, its acceleration is in the opposite direction of its velocity.

**Can an object be increasing speed as its acceleration decreases?**

Yes. An object will be increasing in speed so long as it’s acceleration is positive. Since it is possible for an acceleration to be both positive and decreasing, it is possible that an object can be both increasing in speed and decreasing in acceleration.

## Why does the acceleration remain constant despite the changing direction?

As mentioned earlier in Lesson 1, an object moving in uniform circular motion is moving in a circle with a uniform or constant speed. The velocity vector is constant in magnitude but changing in direction. It is accelerating because the direction of the velocity vector is changing. …

## Can an object maintain its motion in the same direction while reversing the direction of acceleration?

Yes reversing the direction of acceleration will produce retardation. Consequently the velocity will start decreasing with time but the direction of motion will be maintained till the velocity is reduced to zero and get reversed.

**Do you notice any relation between the velocity2 radius and acceleration?**

10. Do you notice any relation between the velocity^2, radius, and acceleration? Acceleration increases as velocity increases, and it decreases as velocity decreases. As radius increases, acceleration decreases, and as it decreases, acceleration increases.

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

(i) A body can have acceleration even when it has uniform speed. 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.

### What is the difference between positive and negative acceleration?

Mathematically, a negative acceleration means you will subtract from the current value of the velocity, and a positive acceleration means you will add to the current value of the velocity.

**Can a body have positive velocity and negative acceleration?**

Yes, a body can have positive velocity and negative acceleration at the same time.

#### How do you know if a graph has a positive or negative acceleration?

If the acceleration is zero, then the slope is zero (i.e., a horizontal line). If the acceleration is positive, then the slope is positive (i.e., an upward sloping line). If the acceleration is negative, then the slope is negative (i.e., a downward sloping line).

#### Which formula is used to find an object’s acceleration?

Acceleration (a) is the change in velocity (Î”v) over the change in time (Î”t), represented by the equation a = Î”v/Î”t. This allows you to measure how fast velocity changes in meters per second squared (m/s^2). Acceleration is also a vector quantity, so it includes both magnitude and direction.

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

The velocity-time graph shows a line with a positive (upward) slope (positive acceleration); the line is located in the positive region of the graph (corresponding to a positive velocity). The acceleration-time graph shows a horizontal line in the positive region of the graph (positive acceleration).