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19 Terms
Scientific Method
Observation, question, hypothesis, experiment, data, conclusion.
Lever
A simple machine that consists of a rigid bar that rotates around a fixed point called a fulcrum.
Work
Force applied over a distance.
Power
The rate at which work is done.
Efficiency
Output work divided by input work.
Mechanical Advantage
Output force divided by input force.
Kinetic Energy
Energy of motion.
Potential Energy
Stored energy due to position.
Law of Conservation of Energy
Energy cannot be created or destroyed.
Force
A push or pull on an object.
Newton's 2nd Law
States that force equals mass times acceleration (F = m × a).
Acceleration due to gravity
The acceleration experienced by an object due to Earth's gravitational pull, approximately 9.8 m/s².
Friction
A force that opposes motion.
Inclined Plane
A flat surface tilted at an angle to help lift objects.
Nuclear Energy
Energy stored in atomic nuclei.
Horsepower
A unit of power equal to 746 watts.
Density
Mass divided by volume.
Net Force
The total force acting on an object.
Unbalanced Forces
Forces that cause a change in an object's motion.
