Kinematics and Dynamics - Key terms
A change in velocity.
The study of why objects move as they do; compare with kinematics.
The product of mass multiplied by acceleration.
A statement capable of being scientifically tested for accuracy.
The tendency of an object in motion to remain in motion, and of an object at rest to remain at rest.
The study of how objects move; compare with dynamics.
A measure of inertia, indicating the resistance of an object to a change in its motion—including a change in velocity.
The material of physical reality. There are four basic states of matter : solid, liquid, gas, and plasma.
The study of bodies in motion.
The sum of two or more vectors, which measures the net change in distance and direction.
A quantity that possesses only magnitude, with no specific direction. Mass, time, and speed are all scalars. The opposite of a scalar is a vector.
The rate at which the position of an object changes over a given period of time.
Space entirely devoid of matter, including air.
A quantity that possesses both magnitude and direction. Velocity, acceleration, and weight (which involves the downward acceleration due to gravity)are examples of vectors. Its opposite is ascalar.
The speed of an object in a particular direction.
A measure of the gravitational force on an object; the product of mass multiplied by the acceleration due to gravity. (The latter is equal to 32 ft or 9.8 m per second per second, or 32 ft/9.8 m per second squared.)