# Hacktivateed

## What is the acceleration of the ball when it is moving up?

If you throw the ball upward with a speed of 9.8 m/s, the velocity has a magnitude of 9.8 m/s in the upward direction. Now the ball is under the influence of gravity, which, on the surface of the Earth, causes all free-falling objects to undergo a vertical acceleration of –9.8 m/s2.

## When the vectors for acceleration and velocity are pointing in opposite directions an object is speeding up *?

If the velocity and acceleration are in the same direction (both have the same sign – both positive or both negative) the object is speeding up. If the velocity and acceleration are in opposite directions (they have opposite signs), the object is slowing down.

What is the difference between average acceleration and instantaneous acceleration?

What is the difference between average acceleration and instantaneous acceleration? Average acceleration is the change of velocity over a period of time. Instantaneous acceleration is the change of velocity over an instance of time.

### Do acceleration vectors show the magnitude and direction?

Acceleration is a vector; it has both a magnitude and direction. The SI unit for acceleration is meters per second squared. Acceleration can be caused by a change in the magnitude or the direction of the velocity, or both.

### Is acceleration positive or negative going up?

When an object is speeding up, the acceleration is in the same direction as the velocity. Thus, this object has a positive acceleration. In Example B, the object is moving in the negative direction (i.e., has a negative velocity) and is slowing down.

Can a body have positive velocity and negative acceleration?

Explanation: Yes, a body can have positive velocity and negative acceleration at the same time. For example when a lift goes upwards from 4th to 8th floor considering base as origin and get stopped , then velocity is positive while acceleration is negative.

## Is acceleration always in the same direction as velocity?

Acceleration is a vector in the same direction as the change in velocity, Δv. Since velocity is a vector, it can change either in magnitude or in direction. Keep in mind that although acceleration is in the direction of the change in velocity, it is not always in the direction of motion.

## Does acceleration increase if velocity increases?

Any change in the velocity of an object results in an acceleration: increasing speed (what people usually mean when they say acceleration), decreasing speed (also called deceleration or retardation ), or changing direction (called centripetal acceleration ).

What is the difference between acceleration and acceleration?

Therefore acceleration is defined as the rate of change of velocity. If the velocity of a body is changed from “u” to “v” in time “t”, then acceleration is given as follows….Differences Between Acceleration And Velocity – Different types of Motion.

Velocity Acceleration
SI unit is m/s or ms–1. SI unit is m/s2 or ms–2.

### What is average acceleration formula?

In other words, it is the change in velocity over a particular period of time. Similarly, the average acceleration is the final velocity minus the initial velocity per time is taken. Therefore, the formula for average acceleration formula is: Aavg = Δv / Δt.

### What is the magnitude and direction of acceleration?

In other words, acceleration is a vector. The length of the vector is its magnitude. Its direction is the direction of the vector. So the magnitude of acceleration is the magnitude of the acceleration vector while the direction of the acceleration is the direction of the acceleration vector.

Does acceleration have magnitude and direction?

Acceleration is a vector, and thus has a both a magnitude and direction. Acceleration can be caused by either a change in the magnitude or the direction of the velocity. Instantaneous acceleration a is the acceleration at a specific instant in time.

## What happens when a child drops a ball?

When a child drops a ball, the instantaneous acceleration of the ball as the child lets go is zero. False A toy rocket is launched vertically upward. When the rocket reaches its highest point, it’s velocity is at its maximum. False The free-fall acceleration on earth is 9.8 m/s^2 in any direction. False

## When does an object have zero instantaneous acceleration?

When the vectors for acceleration and velocity are pointing in opposite directions, an object is speeding up. False When a child drops a ball, the instantaneous acceleration of the ball as the child lets go is zero. False A toy rocket is launched vertically upward.

What is the acceleration of an object in free fall?

The free-fall acceleration on earth is 9.8 m/s^2 in any direction. False You can use equations for motion with constant acceleration to solve problems involving objects in free fall.

### When do acceleration vectors show the magnitude of acceleration?

Acceleration vectors show the magnitude and direction of the average acceleration during a time interval. True When the vectors for acceleration and velocity are pointing in opposite directions, an object is speeding up. False When a child drops a ball, the instantaneous acceleration of the ball as the child lets go is zero. False