Acceleration is the rate of change of velocity.
The unit of acceleration is ms-2.
If a quantity changes at a constant rate, the change in the quantity is the final - initial value.
If the velocity changes at a constant rate, the change in velocity is the final - initial velocity.
The rate of change is the change over an interval Δt of time.
Hence, constant acceleration is given by:
where v is the final velocity, u is the initial velocity, a is acceleration and t is time
Acceleration is a vector quantity. Positive acceleration means the speed is increasing and v is greater than u. Negative acceleration means the speed is decreasing and u is greater than v.
Acceleration can be shown on a distance-time graph.
The gradient of the line is the speed. The gradient is increasing, so the speed is increasing. If the gradient decreases, then the speed decreases and the object is decelerating.
A horizontal gradient means the gradient or speed is zero.
Velocity-time graphs can also be used to represent the motion of an object.
The gradient of a velocity-time graph is acceleration. A positive gradient means a positive acceleration
A negative gradient means a negative acceleration.
The unit of acceleration is ms-2.
If a quantity changes at a constant rate, the change in the quantity is the final - initial value.
If the velocity changes at a constant rate, the change in velocity is the final - initial velocity.
The rate of change is the change over an interval Δt of time.
Hence, constant acceleration is given by:
where v is the final velocity, u is the initial velocity, a is acceleration and t is time
Acceleration is a vector quantity. Positive acceleration means the speed is increasing and v is greater than u. Negative acceleration means the speed is decreasing and u is greater than v.
Acceleration can be shown on a distance-time graph.
The gradient of the line is the speed. The gradient is increasing, so the speed is increasing. If the gradient decreases, then the speed decreases and the object is decelerating.
A horizontal gradient means the gradient or speed is zero.
Velocity-time graphs can also be used to represent the motion of an object.
The gradient of a velocity-time graph is acceleration. A positive gradient means a positive acceleration
A negative gradient means a negative acceleration.