Forces & Motion Flashcards
Speed/Velocity & Acceleration, Different types of Forces, and Laws of Motion (27 cards)
Speed, Velocity, & Acceleration
How is speed calculated?
Formula Units: (m), (s) = (m/s)
Distance/Time = Speed
Formula Units: (m), (s) = (m/s)
Speed, Velocity, & Acceleration
What is the main different between Speed and Velocity?
Debra’s Hint: One depends on direction.
(Optional to flip if needed)
Speed is how quickly something (object) moves. Velocity is speed and the direction it’s going.
Speed, Velocity, & Acceleration
What does a positive or negative sign tell you about direction?
Debra’s Hint: Sort of Motion you can do with your hands.
(Optional to flip if needed)
Positive = Forward and Upward Motion (+)
Negative = Backward and Downward Motion (-)
Speed, Velocity, & Acceleration
What is meant by Acceleration?
Debra’s Hint: You can see this on a graph and includes velocity.
(Optional to flip if needed)
Acceleration is the rate at which velocity changes with time, in terms of both speed and direction.
- Rate of change of velocity as a function of time.
Speed, Velocity, & Acceleration
How is accleration calculated?
Formula Units: (V1-V2)/ (s)2
Final Velocity - Initial Velocity/Time
Formula Units: (FV-IV)/ (s)2
Metric Units: m/s2 (Meters per second squared)
Speed, Velocity, & Acceleration
What happens to acceleration when an object has constant speed?
Debra’s Hint: Straight Line
(Optional to flip if needed)
If the acceleration is at constant speed, then that means it has zero acceleration.
Speed, Velocity, & Acceleration
What does negative acceleration tell you?
Debra’s Hint: Opposite of fast
(Optional to flip if needed)
Negative acceleration tells us its getting slower.
- Slowing down an object’s speed or velocity
Speed, Velocity, & Acceleration
What happens to the calculated velocity of an object in relation to its acceleration?
When an object is accelerating, its velocity…
(Optional to flip if needed)
When an object is accelerating, its velocity increases or decreases, affecting how far it travels in a given time frame.
Forces
What is Force?
Debra’s Hint: Causes an Action.
(Optional to flip if needed)
Force is the cause of acceleration, or change in an object’s velocity, measured in Newtons (N).
- Push or Pull on an object that can change its motion
Forces
What is meant by net force and how is it calculated?
Formula Units: (N) = (kg) x (m/s2)
(Optional to flip if needed) Debra’s Hint: Newton’s Second Law of Motion
Net Force is the combination of all forces being acted on the object.
- It adds up all the forces pushing or pulling in one direction
Formula: Fnet = Mass x Acceleration
Formula Units: (N) = (kg) x (m/s2)
Different Types of Forces
Normal Force?
Debra’s Hint: This force opposes weight/gravity
(Optional to flip if needed)
Force perendicular to the surface in contact with an object.
- This force opposes weight/gravity
Different Types of Forces
Applied Force
Debra’s Hint: Overcomes all other forces
(Optional to flip if needed)
Any force that is extereted on an object to move.
Different Types of Forces
Buoyant Force
Debra’s Hint: Water.
(Optional to flip if needed)
The upward force a fluid exerts on an object.
Different Types of Forces
Tensional Force
Debra’ Hint: Rope or String
(Optional to flip if needed)
A a pulling force that acts on a rope, string, or other objects.
Different Types of Forces
Thrust Force
Debra’s Hint: Aircraft
A mechanical force that is generated through the reaction of accelerating a mass of gas.
- Thrust force is used to move aircraft through the air.
Different Types of Frictional Forces
Static Friction?
Debra’s Hint: Newtons First Law of Motion first sentence.
Between two surfaces not in motion.
** Different Types of Frictional Forces**
Rolling Friction?
Debra’s Hint: Rolling ball or wheel
Opposes the motion of a rolling object (wheel/ball)
Different Types of Frictional Forces
Sliding Friction?
Debra’t Hint: Weaker than one other “S” Force.
Weaker than Static Force and a type of kinetic friction in which two surfaces are in contact and moves relative to one another.
** Different Types of Frictional Forces**
Air resistence?
Debra’s hint: Through the air
Frictional Force that acts upon an object traveling through the air.
** Different Types of Frictional Forces**
Viscous Force?
(If I take 1 minute) Debra, just flip the darn thing.
A measure of a fluids resistance to flow.
- Develops between and the fluid layers to restrict the relative motion between them.
Laws of Motion
What is the First Law of Motion and What does it mean?
Debra’s Hint: Resting/Moving
(Optional to flip if need)
Law of Inerstia
- An object at rest will stay at rest, and an object that’s moving will remain at constant velocity will keep moving in the same speed and direction unless an outside force acts on the moving object.
Laws of Motion
What is momentum and how is it calculated?
Debra’s Hint: Think of mass
Formula: P = kg x (m/s)
Momentum is mass in motion.
Formula: Momentum (P) = Mass (kg) x Velocity (m/s)
Laws of Motion
What is meant by the Law of Conversation of Momentum?
Debra’s Hint: What is the effect of collusion between two objects?
(Optional to flip if needed)
The total momentum of object’s colliding is the same before and after the collision. As long as no outiside forces change their velocities after collision.
Laws of Motion
What is the Second Law of Motion and what does it mean?
Debra’s Hint: Causes it to accelerate
(Optional to flip if needed)
Law of Acceleration
- When an unbalaced force is applied to an object, it causes it to accelerate.
- The greater the force applied the greater the acceleration
- The lesser the force applied the lesser the acceleration
- If the same force is applied to a Large mass, it will cause it to accelerate slower, and if it the same force is applied to a Small mass, it will cause it to accelerate faster
