Physical Science Unit 4

Start Studying!

Terms

undefined, object

copy deck

What is a force?: It is a push or pull that can cause a change in the motion of an object.
What is impulse?: It is the product of the amount of force on an object and the time during which the force is applied.
What does the impulse-momentum theorem state?: It states that an impulse causes a change in momentum.
What kind of relationship do values when they are inversely proportional?: They have a relationship in which one value increases while the other decreases.
What is an isolated system?: It is a collection of matter that doesn't interact with anything else in the universe.
What is mass?: It is the quantity of matter in an object?
What is momentum?: It is the product of mass and velocity.
What does Newton's Third Law of Motion state?: It states that when an object exerts a force on a second object, the second object exerts back on the first that is equal to, and opposite in direction from, the original force.
What does rebound mean?: It means to bounce off.
What is a vector?: It is a quantity that has both magnitude and direction.
What is velocity?: It is an object's displacement divided by the time it takes to move that amount.
What is a compound machine?: It is two more simple machines combined into a single device.
What is efficiency?: It is the ratio of a machine's output work to its input work, expressed as a percentage.
What is horsepower?: It is power equivalent to that of one horse, or 746 watts.
What is an inclined plane?: It is a flat surface, at an angle to the horizontal.
What is input force?: It is the force applied to the machine by its user.
What is a lever?: It is a bar, beam, or road that pivots around a fixed position.
What is mechanical advantage?: It is the ratio of a machine's output force to its input force.
What is output force?: It is the force applied by the machine.
What is a pulley?: It is a wheel with a grooved edge for holding a rope, a chain, or a cable.
What is a scalar?: It is a quantity that has a magnitude but no direction.
What is a screw?: It is an inclined plane wrapped around a cylindrical post.
What is a watt?: It is the standard unit of power, equivalent to doing one Joule of work each second.
What is weight?: It is the force of gravity acting on an object.
What is a wheel and axle?: It is a lever that rotates around a center point, or fulcrum.
What is work?: It is the product of a force on an object and the object's resulting displacement.
What is chemical energy?: It is energy stored in the bonds between atoms in molecules.
What is a conservative force?: It is a force whose effects are the same regardless of the path the object takes.
What is electrical energy?: It is energy that can be carried by moving electrons in an electric conductor.
What is energy?: It is the capacity to do work.
What is kinetic energy?: It is energy an object possesses because of its motion.
What does the Law of Conservation of Energy state?: It states that energy cannot be created or destroyed, though it may be transformed from one form to another.
What does the Law of Conservation of Momentum state?: It states that, in an isolated system, the total momentum before a collision equals the total momentum after a collision.
What is mechanical energy?: It is energy an object possesses because of its motion or position.
What is a nonconservative force?: It is a force whose effects depend on the path taken by the object.
What is nuclear energy?: It is energy released when the nuclei of atoms are changed.
What is potential energy?: It is stored energy that can be converted to other forms.
What is radiant energy?: It is energy that is released by atoms that absorb energy from an outside source.
What is speed?: It is the rate of change of distance?
What is thermal energy?: It is the energy of moving or vibrating molecules.
What does the work-energy theorem state?: It states that when a net force does work on an object, the object's kinetic energy changes.

Start Studying!

Deck Info

Number of cards 41