Flash Cards 9
Science
What are forces?
A force is a push or a pull.
What is a net force?
Net force is the overall force on a object.
What are unbalanced forces?
Unbalanced forces acting on an object will change the object’s motion.
What are balanced forces?
Balanced forces acting on an object will not change the object’s motion.
What is Friction?
The force that two surfaces exert on each other when they rub against each other is called friction.
What is static friction?
Static friction acts on objects that aren’t moving.
What is sliding friction?
Sliding friction occurs when solid surfaces slide over each other.
What is rolling friction?
Rolling friction occurs when an object rolls over a surface.
What is fluid friction?
Fluid friction results when an object moves through a fluid—a liquid or a gas.
What is gravity?
Gravity is the force that pulls objects toward each other. The law of universal gravitation states that the force of gravity acts between all objects in the universe.
What is mass?
Mass is a measure of the amount of matter in an object.
What is weight?
Weight is the force of gravity on a person or object at the surface of a planet.
What is the difference between Mass and Weight?
Weight is the force of gravity on a person or object at the surface of a planet. While Mass is a measure of the amount of matter in an object.
What is Newton’s first law of motion?
Newton’s First Law of Motion (Inertia) An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.
What is Newton’s second law of motion?
Newton’s second law states that the acceleration of an object is directly related to the net force and inversely related to its mass.
