Motion & Newton's Laws
What force keeps objects from floating into space?
Gravity.
What type of circuit allows electricity to flow continuously?
Closed circuit.
What type of wave moves perpendicular to its direction of travel?
Transverse wave.
What type of energy is stored in food?
Chemical energy.
What type of simple machine is a ramp?
Inclined plane.
What is Newton’s Second Law of Motion?
Force = mass × acceleration (F = ma).
What is the unit of electric current?
Ampere (A).
What is the speed of sound in air?
About 343 m/s.
What type of energy causes the movement of ocean currents?
Thermal energy.
What type of lever is a seesaw?
First-class lever.
What is inertia?
An object’s resistance to changes in motion.
What does a magnet always have?
A north and south pole.
What property of a wave determines its pitch?
Frequency.
What energy transformation occurs in a battery-powered flashlight?
Chemical to electrical to light energy.
What is mechanical advantage?
The ratio of output force to input force in a machine.
What causes friction?
Contact between surfaces.
What happens when a wire moves through a magnetic field?
An electric current is induced.
What happens to the pitch of a sound if the source moves toward the listener?
It increases (Doppler Effect).
What is the law that states energy cannot be created or destroyed?
Law of Conservation of Energy.
What tool measures angles in engineering?
Protractor.
What happens when opposing forces are balanced?
The object remains at rest or moves at a constant speed.
What material is a good conductor of electricity?
Copper
What type of wave does light travel as?
Electromagnetic wave.
What type of energy is produced by splitting atomic nuclei?
Nuclear energy.
What engineering principle helps buildings withstand earthquakes?
Flexible foundations and shock absorbers.