Vocabulary
Velocity
Speed in a particular direction
Effect
A result or change that happens because of an event or process
First Key Concept
A force is required to change the velocity of an object
An object velocity changes from 20m/s to 50/ms over the course of 5 seconds. What is the average acceleration?
6 m/s2
An object weighs 2kg and its acceleration is 2 m/s2. What is the force of the object?
4
Force
A push or a pull that can change the motion of an object
Friction
A force between an object and the surface it is moving over
Second Key Concept
How an object changes velocity depends on the directions of the force exerted on that object
An object velocity changed from 30 m/s to 60 m/s over the course of 10 seconds. What is the average acceleration
3 m/s2
An object weighs 30kg and its acceleration is 1.125 m/s2. What is the force of the object?
33.75
Exert
To apply a force
Infer
To reach a conclusion using evidence and reasoning
Third Key Concept
A stronger force can cause a greater change in velocity
An object velocity changed from 100 m/s to 50 m/s over the course of 10 seconds. What is the average acceleration?
-5 m/s2 or a deceleration of 5 m/s2
An object weighs 15kg and has a force of 90. What is the object's acceleration?
6 m/s2
Cause
An event or process that leads to a result or change
Number of Key Concept + Number of Vocabulary
11
Fourth Key Concept
Understanding a cause-and-effect relationship can help you infer what led to a particular result
An object velocity changed from 10 to 2 over the course of 0.25 seconds. What is the average acceleration?
-32 m/s2 or a deceleration of 32 m/s2
An object weighs 125kg and has a force of 300. What is the object's acceleration?
2.4 m/s2