Motion Flashcards
What is motion?
Change in object’s position over time
Motion is defined by comparing an object’s position to another object.
What is a reference point?
Object that appears to stay in place
Reference points are crucial for determining motion.
How is speed measured?
Distance per time
An example of speed measurement is km/hr.
What is average speed?
Total distance traveled divided by the time taken
Average speed gives a general idea of how fast an object is moving over a distance.
Define velocity.
Speed of an object and the direction of travel
Velocity differs from speed as it includes direction.
When does velocity stay constant?
If speed and direction do not change
Constant velocity implies no net external forces acting on the object.
What is acceleration?
Rate at which velocity changes
Acceleration can occur due to changes in speed or direction.
What does Newton’s First Law of Motion state?
An object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced force
This law is also known as the law of inertia.
What is friction?
Force that occurs when surfaces are in contact
Friction always opposes motion.
What does Newton’s Second Law of Motion state?
Acceleration depends on the mass of the object and the net force applied
This law can be expressed mathematically as F = ma.
What is the formula for Newton’s Second Law of Motion?
F = ma
F represents force, m represents mass, and a represents acceleration.
What does Newton’s Third Law of Motion state?
For every action, there is an equal and opposite reaction
This law describes the interaction between two objects.
What happens when two objects interact according to Newton’s Third Law?
One object exerts a force on the second object and the second object applies an equal and opposite force to the first object
This interaction illustrates the principle of action-reaction pairs.
What is motion?
Change in an object’s position over time.
How is an object’s position compared?
By comparing it to another object.
What is a reference point?
An object that appears to stay in place.
What is speed?
Measure of the distance an object moves in a given amount of time.
Measured in distance per time, e.g., km/hr.
What is average speed?
Total distance traveled divided by the time taken to cover that distance.
What is velocity?
Speed of an object and the direction of travel.
When does velocity stay constant?
If speed and direction do not change.
What is acceleration?
Rate at which velocity changes.
What is the First Law of Motion?
Unless acted upon by an unbalanced force, an object at rest and an object in motion stays in motion at a constant velocity.
Also called the law of inertia.
What is friction?
Force that occurs when surfaces are in contact and always opposes motion.
What is the Second Law of Motion?
Acceleration of an object depends on the mass of the object and the net force applied.
Expressed mathematically as F = ma (Force equals mass times acceleration).
