Table of Contents

- 1 Does initial velocity increase acceleration?
- 2 How does velocity affect acceleration?
- 3 Why is acceleration positive when velocity is negative?
- 4 Is acceleration directly proportional to velocity?
- 5 What is tangential acceleration formula?
- 6 Does constant speed mean no acceleration?
- 7 Does acceleration always result from a change in velocity?
- 8 What makes velocity different from acceleration?

## Does initial velocity increase acceleration?

That’s because acceleration depends on the change in velocity and velocity is a vector quantity — one with both magnitude and direction. Thus, a falling apple accelerates, a car stopping at a traffic light accelerates, and the moon in orbit around the Earth accelerates.

### How does velocity affect acceleration?

If acceleration points in the same direction as the velocity, the object will be speeding up. And if the acceleration points in the opposite direction of the velocity, the object will be slowing down. Another way to say this is that if the acceleration has the same sign as the velocity, the object will be speeding up.

**What does initial velocity affect?**

Forces acting on any object will cause it to accelerate. Due to this acceleration velocity of the object changes. Therefore, the initial velocity is the velocity of the object before the effect of acceleration, which causes the change.

**Is acceleration a change in speed or velocity?**

Explanation: Acceleration is defined as the rate of change of velocity. Velocity is a vector, which means it contains a magnitude (a numerical value) and a direction. So the velocity can be changed either by changing the speed or by changing the direction of motion (or both).

## Why is acceleration positive when velocity is negative?

An object which moves in the negative direction has a negative velocity. If the object is slowing down then its acceleration vector is directed in the opposite direction as its motion (in this case, a positive acceleration).

### Is acceleration directly proportional to velocity?

The longer the acceleration, the greater the change in velocity. Change in velocity is directly proportional to time when acceleration is constant.

**Can initial velocity be zero?**

When a body starts from rest or it changes it direction of motion,it is called as initial velocity. We generally consider initial velocity is equal to zero(u=0),only when the object starts from rest. Generally at time (t=0),the initial velocity is zero.

**What is the initial velocity?**

Initial Velocity is the velocity at time interval t = 0 and it is represented by u. It is the velocity at which the motion starts.

## What is tangential acceleration formula?

The tangential acceleration = radius of the rotation * its angular acceleration. It is always measured in radian per second square. Its dimensional formula is [T-2]. When an object makes a circular motion, it experiences both tangential and centripetal acceleration.

### Does constant speed mean no acceleration?

The velocity vector is constant in magnitude but changing in direction. Because the speed is constant for such a motion, many students have the misconception that there is no acceleration. For this reason, it can be safely concluded that an object moving in a circle at constant speed is indeed accelerating.

**How do you know if acceleration is negative?**

The acceleration is negative when the object is moving in the positive direction, but the rate of change of velocity is negative(velocity is decreasing). We can also define these two acceleration when an object travels in the negative or opposite direction(right to left).

**Is it possible to have a negative velocity but a positive acceleration?**

In Example B, the object is moving in the negative direction (i.e., has a negative velocity) and is slowing down. According to our general principle, when an object is slowing down, the acceleration is in the opposite direction as the velocity. Thus, this object also has a positive acceleration.

## Does acceleration always result from a change in velocity?

Yes, that’s right, a change in the direction of motion results in an acceleration even if the moving object neither sped up nor slowed down. That’s because acceleration depends on the change in velocity and velocity is a vector quantity – one with both magnitude and direction.

### What makes velocity different from acceleration?

The rate of change of displacement is known as velocity whereas acceleration is the rate of change of velocity.

**What causes a change in acceleration and velocity?**

Acceleration and velocity. Newton’s second law says that when a constant force acts on a massive body, it causes it to accelerate, i.e., to change its velocity, at a constant rate. In the simplest case, a force applied to an object at rest causes it to accelerate in the direction of the force.

**What two factors affect the rate of acceleration of an object?**

The acceleration of an object depends on two factors, velocity and direction. An object that moves with constant speed but that changes direction is also accelerating. A car traveling around a curve in the road is accelerating even though its speed remains constant.