## What kind of acceleration occurs when an object speeds up?

Positive **acceleration occurs when an object speeds up**.

## What occurs when an object is accelerating?

When the velocity of an **object** changes it is said to be **accelerating**. **Acceleration** is the rate of change of velocity with time. In everyday English, the word **acceleration** is often used to describe a state of increasing speed. **Acceleration occurs** anytime an **object’s** speed increases or decreases, or it changes direction.

## How can acceleration of an object be increased?

As **we increase** the force on an **object** the **acceleration increases** proportionally. Since the mass **does** not change as the **acceleration increases**, **we can** say that force is equal **to acceleration**. Therefore, if you double the force you double the **acceleration**.

## What is happening to the velocity of an object if it has a 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**. In Example D, the **object** is moving in the **negative** direction (i.e., **has a negative velocity**) and is speeding up.

## How is the acceleration of an object calculated?

**Acceleration** (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt. 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.

## Does a negative acceleration always mean an object is slowing down?

If you **always** choose the current direction of motion as positive, then an **object** that is **slowing down** will **always** have a **negative acceleration**.

## Can an object accelerate if its velocity is constant?

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. Since it travels in a straight line, **its** direction **does** not change.

## How can something accelerate without changing speed?

You **can accelerate** and not **change** the **speed** if you are always **accelerating** perpendicular to the direction of motion. Another way of saying this is that acceleration only changes the **speed** if it is the same direction as the velocity.

## What is the difference between acceleration and velocity?

The Main **Difference Between Velocity** and **Acceleration**

**Velocity** and **acceleration** both use speed as a starting point in their measurements. **velocity** – the rate of displacement of a moving object over time. **acceleration** – the rate of **velocity** change over time.

## What force is needed to make an object move in a circle?

A centripetal force is a **net force** that acts on an object to keep it moving along a circular path.

## What is the difference between speed and velocity?

The reason is simple. **Speed** is the time rate at which an object is moving along a path, while **velocity** is the rate and direction of an object’s movement. Put another way, **speed** is a scalar value, while **velocity** is a vector.

## Can acceleration be negative when velocity is zero?

If an object has non-**zero acceleration**, it **does** not mean that the object is speeding up. It simply means that the **velocity** is changing. Since vfinal may be either positive, **negative**, or **zero**, and either larger, smaller, or the same as vinitial, the **acceleration** may be positive, **negative**, or **zero**.

## Can acceleration be constant when speed is not zero?

1 Expert Answer

**Speed** is just the magnitude part of the velocity. **Acceleration** is the change in velocity over a period of time. It would momentarily have **zero speed** at the top of its motion, but the velocity is **not zero**, because the direction of the object’s motion is changing from upward to downward.

## Can an object be increasing in 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**.