Physics MidTerm

Question 1

A pattern, plan, representation, or description designed to show the structure of workings of an object, system, or concept.

Answer 1

Model

Question 2

A set of particles or interacting components considered to be a distinct physical entity for the purpose of study

Answer 2

System

Question 3

An explanation that is based on prior scientific research or observations and that can be tested

Answer 3

Hypothesis

Question 4

An experiment that tests only one factor at a time by using a comparison of a control group with an experimental group

Answer 4

Controlled Experiment

Question 5

A description of how close a measurement is to correct or accepted value of the quantity measured

Answer 5

Accuracy

Question 6

The degree of exactness of a measurement

Answer 6

Precision

Question 7

Those digits in a measurement that are known with certainty plus the first digit that is uncertain

Answer 7

Significant Figures

Question 8

A system for specifying the precise location of objects in space and time

Answer 8

Frame of Reference

Question 9

The change in position of an object

Answer 9

Displacement

Question 10

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

Answer 10

Average velocity

Question 11

The velocity of an object at some instant or at a specific point in the object’s path

Answer 11

Instantaneous Velocity

Question 12

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

Answer 12

Acceleration

Question 13

The motion of a body when only the force due to gravity is acting on the body

Answer 13

Free Fall

Question 14

A physical quantity that has magnitude but no direction

Answer 14

Scalar

Question 15

A physical quantity that has both magnitude and direction

Answer 15

Vector

Question 16

A vector that represents the sum of two more vectors

Answer 16

Resultant

Question 17

The projections of a vector along the axes of a coordinate system

Answer 17

Components of a vector

Question 18

the curved path that an object follows when thrown, launched, or otherwise projected near the surface of Earth

Answer 18

Projectile motion

Question 19

an action exerted on an object which may change the object’s state of rest or motion

Answer 19

force

Question 20

the tendency of an object to resist being moved or, if the object is moving, to resist a change in speed or direction

Answer 20

Inertia

Question 21

A single force whose external effects on a rigid body are the same as the effects of several actual forces acting on the body

Answer 21

Net forces

Question 22

The state in which the net force on an object is zero

Answer 22

Equilibrium

Question 23

A measure of the gravitational force exerted on an object; its value can change with the location of the object in the universe

Answer 23

weight

Question 24

a force that acts on a surface in a direction perpendicular to the surface

Answer 24

normal force

Question 25

the force that resists the initiation of sliding motion between two surfaces that are in contact and at rest

Answer 25

static friction

Question 26

the force that opposes the movement of two surfaces that are in contact and sliding over each other

Answer 26

kinetic friction

Question 27

the ratio of the magnitude of the force of friction between two objects in contact to the magnitude of the normal force with which the objects press against each other

Answer 27

coefficient of friction

Question 28

the product of the component of a force along the direction of displacement and the magnitude of the displacement

Answer 28

work

Question 29

the energy of an object that is due to the object's motion

Answer 29

kinetic energy

Question 30

the net work done by all the forces acting on an object is equal to the change in the object's kinetic energy

Answer 30

work-kinetic energy theorem

Question 31

the energy is associated with an object because of the position, shape, or condition of the object

Answer 31

potential energy

Question 32

the potential energy store in the gravitational fields of interacting bodies

Answer 32

gravitational potential energy

Question 33

the energy available for use when a deformed elastic object returns to its original configuration

Answer 33

elastic potential energy

Question 34

a parameter that is a measure of a springs resistance to being compresses or stretched

Answer 34

spring constant

Question 35

the sum of the kinetic energy and all forms of potential energy

Answer 35

mechanical energy

Question 36

a quantity that measures the rate at which work is done or energy is transformed

Answer 36

power