Vocab List 1

Question 1

*

acceleration is proportional to resultant force, F=ma o F -delta p/ delta t

Answer 1

Newton’s Second Law of Motion

Question 2

vector

Answer 2

quantity which has both magnitude and direction

Question 2

velocity

Answer 2

rate of change of displacement with time v = delta s/delta t. A vector quantity that can also be considered as speed in a specified direction. Velocity may also be determined from gradient of a displacement-time graph. If the velocity of an object changes during a period of time t, the initial velocity is given symbol u and final velocity is given the symbol v.

Question 2

*

average (speed) defined as distance traveled/time taken, v = delta s/delta t. Instantaneous speed is determined over short period of time during which it is assumed speed does not change. It may also be determined from the gradient of a distance-time graph. It is a scalar quantity, but can be compared to velocity.

Answer 2

speed

Question 2

*

Whenever one body exerts a force on another body, the second body exerts exactly the same force on the first body, but in the opposite direction.

Answer 2

Newton’s Third Law of Motion

Question 3

*

units of measurement that are not defined as combinations of other units

Answer 3

fundamental units

Question 4

displacement, x

Answer 4

distance from a ferference point in a specified directio; a vector quantity

Question 6

precision

Answer 6

a measurement where a similar result would be obtained if the measurement was repeated (small random errors)

Question 9

Newton’s Third Law of Motion

Answer 9

Whenever one body exerts a force on another body, the second body exerts exactly the same force on the first body, but in the opposite direction.

Question 10

speed

Answer 10

average (speed) defined as distance traveled/time taken, v = delta s/delta t. Instantaneous speed is determined over short period of time during which it is assumed speed does not change. It may also be determined from the gradient of a distance-time graph. It is a scalar quantity, but can be compared to velocity.

Question 11

*

quantity which has both magnitude and direction

Answer 11

vector

Question 12

*

units of measurement that are defined in terms of other units

Answer 12

derived units

Question 12

*

an object will remain at rest, or continue to move in a straight line at a constant speed, unless a result ant force acts on it

Answer 12

Newton’s First Law of Motion

Question 13

*

a single measurement or series of measurements (of the same quantity) is described as accurate it close to correct result (mean is used if series)

Answer 13

accuracy

Question 14

systematic error

Answer 14

a reading that is always either bigger or smaller than the correct value by the same amount (eg. zero offset error)

Question 14

translational equilibrium

Answer 14

an object is in this state if there is no resultant force acting upon it, so that it remains at rest or continues to move with a constant velocity

Question 15

*

quantities that have only magnitude

Answer 15

scalar

Question 16

*

rate of change of displacement with time v = delta s/delta t. A vector quantity that can also be considered as speed in a specified direction. Velocity may also be determined from gradient of a displacement-time graph. If the velocity of an object changes during a period of time t, the initial velocity is given symbol u and final velocity is given the symbol v.

Answer 16

velocity

Question 17

*

a reading that is always either bigger or smaller than the correct value by the same amount (eg. zero offset error)

Answer 17

systematic error

Question 18

accuracy

Answer 18

a single measurement or series of measurements (of the same quantity) is described as accurate it close to correct result (mean is used if series)

Question 21

fundamental units

Answer 21

units of measurement that are not defined as combinations of other units

Question 22

derived units

Answer 22

units of measurement that are defined in terms of other units

Question 23

*

an object is in this state if there is no resultant force acting upon it, so that it remains at rest or continues to move with a constant velocity

Answer 23

translational equilibrium

Question 24

*

measurements which may be bigger or smaller than the correct value and are scattered randomly around that value

Answer 24

random uncertainty (error)

Question 25

random uncertainty (error)

Answer 25

measurements which may be bigger or smaller than the correct value and are scattered randomly around that value

Question 26

*

a measurement where a similar result would be obtained if the measurement was repeated (small random errors)

Answer 26

precision

Question 27

scalar

Answer 27

quantities that have only magnitude

Question 28

Newton’s First Law of Motion

Answer 28

an object will remain at rest, or continue to move in a straight line at a constant speed, unless a result ant force acts on it

Question 29

Newton’s Second Law of Motion

Answer 29

acceleration is proportional to resultant force, F=ma o F -delta p/ delta t