Subtopics Flashcards
What does the slope of a displacement-time graph represent?
The slope of a displacement-time graph represents velocity.
What does a straight (diagonal) slope on a displacement-time graph indicate?
A straight (diagonal) slope indicates constant velocity.
What does a curved slope on a displacement-time graph represent?
A curved slope represents acceleration.
What does a positive slope on a displacement-time graph signify
A positive slope signifies motion in the positive direction.
What does a negative slope on a displacement-time graph indicate?
A negative slope indicates motion in the negative direction.
What does a zero slope (horizontal line) on a displacement-time graph represent?
A zero slope (horizontal line) represents a state of rest.
What does the area under the curve on a displacement-time graph represent?
The area under the curve on a displacement-time graph is meaningless.
What does the slope of a velocity-time graph represent?
The slope of a velocity-time graph represents acceleration.
What does a straight line on a velocity-time graph indicate?
A straight line on a velocity-time graph indicates uniform acceleration.
What does a curved line on a velocity-time graph represent?
A curved line on a velocity-time graph represents non-uniform acceleration.
What does a positive slope on a velocity-time graph signify?
A positive slope signifies an increase in velocity in the positive direction.
What does a negative slope on a velocity-time graph indicate?
A negative slope indicates an increase in velocity in the negative direction.
What does a zero slope (horizontal line) on a velocity-time graph represent?
A zero slope (horizontal line) represents motion with constant velocity.
What does the area under the curve on a velocity-time graph represent?
The area under the curve on a velocity-time graph equals the displacement or distance traveled.
What does a zero slope (horizontal line) on an acceleration-time graph represent?
A zero slope (horizontal line) on an acceleration-time graph represents an object undergoing constant acceleration.
What does the area under the curve on an acceleration-time graph represent?
The area under the curve on an acceleration-time graph equals the change in velocity.
What does the steepness of the slope on an acceleration-time graph indicate?
The steepness of the slope on an acceleration-time graph is meaningless.
What type of quantity is distance?
Scalar quantity
What type of quantity is Speed?
Scalar quantity
What type of quantity is Mass?
Scalar quantity
What type of quantity is Time?
Scalar quantity
What type of quantity is Volume?
Scalar quantity
What type of quantity is Density?
Scalar quantity
What type of quantity is Pressure?
Scalar quantity
What type of quantity is Electric charge?
Scalar quantity
What type of quantity is temperature?
Scalar quantity
What type of quantity is Displacement?
Vector quantity
What type of quantity is Velocity?
Vector quantity
What type of quantity is Acceleration?
Vector quantity
What type of quantity is Momentum
Vector quantity
What is a scalar?
A scalar is a quantity that has only magnitude (size) and no direction.
What is a vector?
A vector is a quantity that has both magnitude and direction.
What does Newton’s First Law state?
Newton’s First Law states: A body will remain at rest or move with constant velocity unless acted on by a resultant force.
What does Newton’s First Law explain about motion?
The law explains why things move with a constant (or uniform) velocity.
What happens if the forces acting on an object are balanced?
If the forces acting on an object are balanced, then the resultant force is zero and the object is at rest or constant velocity,
What does Newton’s Second Law state?
Newton’s Second Law states: The acceleration of an object with constant mass is directly proportional to the resultant force on it.
What happens if the resultant force is along the direction of motion?
If the resultant force is along the direction of motion, the body will either speed up (accelerate) or slow down (decelerate).
What does it mean when an object is at terminal velocity?
When the drag forces become equal to the driving force, the object reaches its maximum velocity and can no longer accelerate, it is said to be moving at terminal velocity.
What happens if the resultant force is at an angle to the direction of motion?
If the resultant force is at an angle, the body will change direction.
How does the mass of a body affect the change produced by an applied force?
The greater the mass of a body, the smaller the change produced by an applied force.
What is freefall?
Freefall describes the motion of falling objects where the only force acting on them is weight and drag forces are ignored.
What does freefall reveal about the acceleration of objects regardless of their mass or weight?
Freefall shows that all objects must fall with exactly the same value for acceleration (9.81 m/s^2), regardless of their mass or weight.
What does Newton’s Third Law of Motion state?
Newton’s Third Law of Motion states: Whenever two bodies interact, the forces they exert on each other are equal in size, act in opposite directions, and are of the same type.
What important principles about forces does Newton’s Third Law explain?
Newton’s Third Law explains that all forces arise in pairs and that Force pairs are of the same type.
What does the principle of conservation of momentum state?
The principle of conservation of momentum states that in a closed system, the total momentum before an event is equal to the total momentum after the event.
What happens when one object exerts a force on another object?
When one object exerts a force on another object, the second object will exert an equal force on the first object in the opposite direction. (Newton’s third law)
What occurs when two objects collide?
When two objects collide, both objects will react, generally causing one object to speed up (gain momentum) and the other object to slow down (lose momentum).
What is a moment and how does it occur?
A moment is the turning effect of a force. Moments occur when forces cause objects to rotate about some pivot.
