Of course. The magnitude (size) of acceleration is the rate at which speed is
changing. As long as the magnitude of acceleration is more than zero, speed is
increasing. If the magnitude of acceleration is decreasing, then speed is growing
more slowly, but it's still increasing.
That's exactly what's happening to an object falling through air. As it falls faster and
faster, the force of air resistance increases. The object's acceleration shrinks, and
it's speed increases more slowly. When the force of air resistance is equal to the
object's weight, the net force on it is zero, its acceleration is zero, and its speed
stops increasing. It's then at 'terminal velocity'.
When the speed of a body moving in a straight line changes continuously, the body acquires acceleration. This acceleration could be either positive (speeding up) or negative (slowing down), depending on whether the speed is increasing or decreasing.
If that happens, the body's speed will decrease.
A moving body is decelerating when its velocity is decreasing over time. This can be observed when the speed of the body is decreasing, or when the body is moving in the direction opposite to its initial velocity. Deceleration is the opposite of acceleration, where acceleration is the rate of change of velocity, deceleration is the rate at which the speed decreases.
When the body is in simple hermonic motion
Yes, a body can have zero velocity and still be accelerating if its speed is changing, either increasing or decreasing, over time. This is because acceleration is a measure of how the velocity of an object is changing, regardless of its current velocity.
When the speed of a body moving in a straight line changes continuously, the body acquires acceleration. This acceleration could be either positive (speeding up) or negative (slowing down), depending on whether the speed is increasing or decreasing.
If that happens, the body's speed will decrease.
A moving body is decelerating when its velocity is decreasing over time. This can be observed when the speed of the body is decreasing, or when the body is moving in the direction opposite to its initial velocity. Deceleration is the opposite of acceleration, where acceleration is the rate of change of velocity, deceleration is the rate at which the speed decreases.
When the body is in simple hermonic motion
Yes, a body can have zero velocity and still be accelerating if its speed is changing, either increasing or decreasing, over time. This is because acceleration is a measure of how the velocity of an object is changing, regardless of its current velocity.
Once a ball has fallen a distance through the air, and it contacts the ground, its speed will rapidly decrease until it has stopped moving. The acceleration experienced by the ball is so great that it seems to stop instantly. Most likely, it will bounce back up, and then repeat this cycle a few times before coming to rest.
Increasing velocity means that the body is accelerating and a force is acting on the body to produce the acceleration. Uniform velocity means that there is no acceleration or deceleration and so no force acts on the body. (Note that in practice we cannot achieve perpetual motion because of either the decelerating force of gravity or friction).
Both. Acceleration is a change in speed.
No, the distance traveled by the body in free fall is not the same for each time interval. The distance traveled increases with time because the body accelerates due to gravity. This means that the body covers more distance in each subsequent time interval.
Variable acceleration refers to an object's velocity changing by different amounts over time. This means that the object's speed is not changing at a constant rate. An example of variable acceleration is a car speeding up as it merges onto a highway, where the acceleration is increasing. Another example is a rocket slowing down as it enters the atmosphere due to air resistance, where the acceleration is decreasing.
No. A velocity indicates a speed and direction. An acceleration is a change in speed or direction.
You are confusing terms.An acceleration is a change in velocity not necessarily an increase in velocity, it is a change.A change in velocity is brought about by a force acting upon a body.