physics defintions

Question 1

Linear Motion

Answer 1

is a one dimensional motion along a straight line

Question 2

Distance

Answer 2

is a scalar quantity that refers to - “how much and object has covered” during its motion

Question 3

Displacement

Answer 3

the change in position of an object (Final minus initial).

Question 4

Average Velocity

Answer 4

the total displacement divided by the time interval during which the displacement occurred

Question 5

Constant Velocity

Answer 5

An object that has the same constant speed in a constant direction

Question 6

Instantaneous Velocity

Answer 6

the velocity of an object in motion at a specific point in time

Question 7

Acceleration

Answer 7

the rate at which velocity changes over time; an object that accelerates its speed, direction, or both change

Question 8

Free-falling motion

Answer 8

is any motion of a body where gravity is the only acceleration acting upon it.

Question 9

Slope

Answer 9

is the “steepness” of the line - also commonly known as rise over run

Question 10

Y-intercept

Answer 10

is the place where a line or curve cross, or touches, the y-axis. - the vertical, often darkened line in the center of the graph. It is also the point at which x=0.

Question 11

Motion detectors

Answer 11

is a device that detects moving objects, particularly people.

Question 12

Photogates

Answer 12

A device that measures the time between events that interrupt an infra-red beam

Question 13

Accuracy

Answer 13

A description of how close a measurement is to the true value of the quantity measured.

Question 14

Precision

Answer 14

refers to the closeness of two or more measurements to each other.

Question 15

Independent variable

Answer 15

is defined as the variable that is changed or controlled in a scientific experiment (x-axis on a graph).

Question 16

Dependent Variable

Answer 16

is the variable being tested in a scientific experiment (y-axis on a graph).

Question 17

Increments

Answer 17

used in physics and engineering to represent a small change in a parameter such as temperature, electrical current, visible light intensity, or time.

Question 18

X-axis

Answer 18

also called axis of abscissas. (in a plane Cartesian coordinate system) the axis, usually horizontal, along which the abscissa is measured and from which the ordinate is measured.

Question 19

Y-axis

Answer 19

also called axis of ordinates. (in a plane Cartesian coordinate system) the axis, usually vertical, along which the ordinate is measured and from which the abscissa is measured.

Question 20

Data table

Answer 20

Any display of information in tabular form, with rows and, or columns named.