Forces (Revamped) Flashcards
(18 cards)
What is a scalar quantity?
A quantity with only magnitude (e.g., distance, speed).
What is a vector quantity?
A quantity with both magnitude and direction (e.g., velocity, force).
What is a force?
A push or pull caused by interaction with another object; a vector quantity.
What is a contact force?
A force that occurs when two objects are touching (e.g., friction, air resistance).
What is a non-contact force?
A force that acts at a distance (e.g., gravitational, electrostatic, magnetic).
What causes gravity near Earth?
The Earth’s gravitational field strength.
What is weight?
The force acting on an object due to gravity.
What is the equation for weight?
Weight (N) = mass (kg) × gravitational field strength (N/kg).
What is a resultant force?
The single force that represents the effect of all forces acting on an object.
How do you calculate resultant force (same direction)?
Add the magnitudes.
How do you calculate resultant force (opposite direction)?
Subtract the magnitudes.
What happens if resultant force is zero?
The object is balanced.
What is deformation?
A change in shape due to stretching, compressing, bending or twisting.
What is elastic deformation?
Object returns to original shape when force is removed.
What is inelastic deformation?
Object does not return to original shape when force is removed.
What is the spring constant equation?
Force (N) = spring constant (N/m) × extension (m).
What is the equation for elastic potential energy?
Elastic potential energy = 0.5 × spring constant × extension².
What is the importance of BIDMAS in formulas?
To correctly apply operations like squaring only the extension value.
