gravity and motion notes Flashcards
What is gravity?
The natural phenomenon by which all physical bodies are attracted to each other.
What is the constant value of gravity’s pull?
9.8 m/sec²
How does mass affect gravity?
Gravity pull increases with increased mass.
How does distance affect gravity?
Gravity pull increases with less distance between objects.
What is the relationship between mass and gravity?
Directly proportional.
What is the relationship between distance and gravity?
Inversely proportional.
What is acceleration (a)?
The rate of change in the position of an object over time.
What is the acceleration due to gravity?
9.8 m/sec²
What does accelerate refer to?
The increase in movement of an object.
What does decelerate refer to?
The slowing in movement of an object.
What is the formula for acceleration?
Acceleration = Force/mass; a = f/m
What does a heavier object require to move or stop?
More force.
How does force affect acceleration?
The greater the force, the faster or slower an object will accelerate or decelerate.
To decelerate an object, what is required?
A force working in the opposite direction.
To accelerate an object, what is required?
A force in the same direction as the object’s movement.
What is velocity (v)?
The rate of change in the position of an object.
What is speed in the context of velocity?
Magnitude (amount) in velocity.
What are the possible directions in velocity?
North, south, west, east, up, down, left, right.
What is the formula for velocity?
Δv = distance / time with direction.
What does resistance refer to?
Any opposite and opposing force to hinder or reduce movement.
What are two examples of forces that can cause resistance?
- Friction * Air
How can resistance affect velocity?
It can reduce velocity and cause deceleration of objects.
What is inertia?
The resistance of any physical object to any change in its current state of motion, speed, or direction.
Who proposed the concept of inertia?
Sir Isaac Newton.
In which book was the concept of inertia proposed?
Principia Mathematica.
In what year was the concept of inertia proposed?
1687
