All Flashcards
According to Newton's Second Law, what is the effect of applying a net force on an object?
The object accelerates in the direction of the net force. The acceleration is directly proportional to the net force and inversely proportional to the mass ().
What is the effect of the Earth pulling on you?
You pull on the Earth (equal and opposite force).
What are the differences between contact forces and field forces?
Contact Forces: Require physical contact (e.g., friction, normal force) | Field Forces: Act at a distance (e.g., gravity)
What are the key differences between static and kinetic friction?
Static Friction: Opposes the start of motion; can vary up to a maximum value. | Kinetic Friction: Opposes motion once it has started; constant value.
Compare and contrast the Normal Force and Weight.
Normal Force: Perpendicular to the surface, reaction force to an object pressing on a surface. | Weight: Force of gravity, always directed downwards.
Differentiate between action and reaction forces according to Newton's Third Law.
Action Force: Force exerted by object A on object B. | Reaction Force: Force exerted by object B on object A; equal in magnitude and opposite in direction to the action force.
What is the difference between mass and weight?
Mass: A measure of the amount of matter in an object (scalar). | Weight: The force of gravity acting on an object (vector), .
What is a vector?
A quantity with both magnitude (size) and direction.
What is a force?
A push or pull; a vector with magnitude and direction.
What is a Free-Body Diagram (FBD)?
A diagram showing all the external forces acting on an object.
What is the magnitude of a force?
The strength or size of the force.
Define 'Resultant Force'.
The sum of all force vectors acting on an object.
What are action-reaction pairs?
A pair of equal and opposite forces resulting from the interaction between two objects, as described by Newton's Third Law.