Acceleration is
.. (1 point)
O An object's speed in a specific direction
• An object's direction's rate of change
O An object's speed when its motion is constant
O An object's velocity's rate of change
An object's velocity's rate of change.
Acceleration is the rate of change of an object's velocity.
Acceleration is the rate at which an object's velocity changes over time. To understand acceleration, we need to understand velocity first.
Velocity refers to an object's speed in a specific direction. It includes both the object's speed and the direction it is moving in. For example, if a car is traveling at 60 miles per hour eastward, its velocity would be 60 miles per hour to the east.
Acceleration, on the other hand, is the rate at which an object's velocity changes. It tells us how quickly the velocity of an object is changing, either by speeding up (increasing speed), slowing down (decreasing speed), or changing direction.
To calculate acceleration, we need the initial velocity (starting velocity), the final velocity (ending velocity), and the time it took for the change to occur. The formula for acceleration is given by:
Acceleration (a) = (Final Velocity - Initial Velocity) / Time
So, if an object starts with an initial velocity of 10 m/s and ends with a final velocity of 30 m/s over a time of 5 seconds, we can calculate the acceleration as:
Acceleration (a) = (30 m/s - 10 m/s) / 5 s
= 20 m/s / 5 s
= 4 m/s^2
In this case, the object is accelerating at a rate of 4 meters per second squared. The positive value indicates that it is speeding up.
Therefore, the correct answer to your question is: An object's velocity's rate of change.
A motorcycle goes north at 40 miles per hour. A car goes south at 40 miles per hour on the same street. Which statement is true? (1 point)
O The vehicles have the same speed and velocity.
• The vehicles are going in opposite directions, so their speed is not the same.
• The vehicles have the same velocity, but not the same speed.
• The vehicles have the same speed, but different velocity.