The idea is that you should:
a) Calculate the change in velocity.
b) Divide this change by the time.
This gives you the average acceleration over the 20 seconds, in this case.
Acceleration = change in velocity/time = (4 - 2)/20 = 0.1 m/s/s.
0.1 m/s²
Changes.
It is acceleration. The difference between final velocity and initial velocity, divided by the time is the AVERAGE acceleration. Remember, though that velocity is a vector. So if you are going round in a circle at a constant speed, your direction of motion is changing continuously and so you are always accelerating!
Acceleration is defined as the change in velocity over a given time period. Velocity is a vector quantity: it includes speed and direction. That being said, you can accelerate an object without changing its speed by simply changing its direction. A body moving along the circumference of a circle its speed may remain a constant, but its velocity will not be a constant since its direction of motion continuously changes, since the velocity changes it has an acceleration.
no
It is equal to one half of the mass times the velocity squared
Velocity divided by time. The amount the the velocity increases by per second.
Both are vectors. But acceleration and velocity have different dimensions. Acceleration is defined as the rate of change of velocity.
No, since acceleration is defined as a change in velocity. If there is no change, there is no acceleration.
accelerationThe rate at which velocity changes is called "acceleration".
"Acceleration" means change of velocity. If velocity is constant, then acceleration is zero.
Acceleration is the RATE OF CHANGE of velocity. That means that acceleration and velocity have different units.The only similarity is that both are defined as rates of change.
It is 0.1 metre per second-squared.
Acceleration is defined as the rate of change of velocity... so, yes.
Since acceleration is defined as change of velocity divide by time, it has units of (velocity / time). acceleration x time = (velocity / time) x time = velocity
It is 0.1 metre per second-squared.
It is 0.1 metre per second-squared.
It is 0.1 metre per second-squared.