Science Vocabulary Nº3

Simple Machine: A device with few parts that make it easier to do work.

Effort Force: The force applied to a machine.

Resistance Force: The force that a machine acts against.

Lever: A simple machine made of a rigid bar on a pivot point.

Fulcrum: The pivot point of a lever.

Mechanical Advantage: The number of times a a machine multiplies the force applied.

Pulley: A grooved wheel that turns by the action of a rope in the groove.

Wheel and Axle: A simple machine made of a handle or axes attached to the center of a wheel.

Science Vocabulary Nº2

Potential Energy: The energy stored in an object or material.

Gravitational Potential Energy: The potential energy of an object located above the ground.

Kinetic Energy: The energy of a moving object.

Work: Force applied to an object times the distance the object moves.

Science Vocabulary Nº1

Force: a push or pull exerted by one object on another.

Friction: a force that opposes the motion of an object in contact with a surface.

Drag Force: a force that opposes the motion of an object through liquid or gas.


Gravity: a force of attraction that exists between all objects with mass.

Net Force: the combined effect of all the forces acting on an object.

Balanced forces: forces that do not cancel each other out when acting togather on a single object.

Inertia: the tendency of an object to oppose a change in motion.

Momentum: The mass of an object multiplied by its velocity.