EXAM 4

Question 1

push or pull that causes an object to move, stop, or
change direction

Answer 1

FORCE

Question 2

do not cause a change in motion

Answer 2

BALANCED FORCES

Question 3

If the multiple forces
acting at one time

Answer 3

UNBALANCED

Question 4

is the resistance to motion of one object moving relative

to another.

Answer 4

FRICTION

Question 5

operates between two surfaces that are not moving
relative to each other

Answer 5

STATIC FRICTION

Question 6

acts between objects in motion/ sliding friction

Answer 6

KINETIC FRICTION

Question 7

gripping friction

Answer 7

STATIC FRICTION

Question 8

are nonrenewable energy sources

Answer 8

FOSSIL FUELS

Question 9

product of force and displacement of the object and moves under influence of force

Answer 9

WORK

Question 10

ability to do work

• scalar quantity (only magnitude, no direction)
• can change from one form to anothe

Answer 10

ENERGY

Question 11

energy possessed by a body due to its position

Answer 11

GRAVITATIONAL POTENTIAL ENERGY

Question 12

energy possessed by its spring

Answer 12

ELASTIC POTENTIAL ENERGY

Question 13

energy possessed by its body to its motion

Answer 13

KINETIC ENERGY

Question 14

The net work done on an object is equal to the change in its kinetic energy.

Answer 14

WORK ENERGY THEOREM

Question 15

how fast work is done

Answer 15

POWER

Question 16

ability to do work

Answer 16

MECHANICAL ENERGY

Question 17

a unit of power, which is the rate at which work is done or energy is transferred

Answer 17

HORSEPOWER

Question 18

means that a certain quantity (like energy, mass, or momentum) remains constant in a closed system — it cannot be created or destroyed, only changed or transferred

Answer 18

CONSERVATION

Question 19

the degree of hotness or coldness of an object

Answer 19

TEMPERATURE

Question 20

scientifically, it is defined as the measure of the average kinetic energy
of molecules making up an object

Answer 20

TEMPERATURE

Question 21

measures the temperature by making use of a physical
property that changes

Answer 21

THERMOMETER

Question 22

an early theory on heat was called

Answer 22

CALORIC THEORY

Question 23

is viewed as a form of energy that is
transferred from one body to another due to
temperature difference

Answer 23

HEAT

Question 24

SI unit of heat is joule

more common unit is calorie

Answer 24

HEAT

Question 25

freedom of movement of the molecules of a substance determines its state

Answer 25

LATENT HEAT

Question 26

the heat needed to change the state of a body is called

Answer 26

LATENT HEAT

Question 27

change from solid to liquid

Answer 27

FUSION/ MELTING

Question 28

change from liquid to gas

Answer 28

VAPORIZATION

Question 29

substances expand when heated and contract when cooled

Answer 29

THERMAL EXPANSION

Question 30

introduced by William Thompson, popularly known as Lord Kelvin in 1848

Answer 30

KELVIN

Question 31

si unit of temperature.i

Answer 31

KELVIN

Question 32

introduced by Anders Celsius in 1741

Answer 32

CELSIUS

Question 33

temperature scale based on the freezing and boiling points of water

Answer 33

CELSIUS

Question 34

introduced by Polish-born Dutch physicist Daniel Gabriel Fahrenheit in 1724

Answer 34

FARENHEIT

Question 35

is a temperature scale mainly used in the United States for everyday temperature measurements

Answer 35

FARENHEIT

Question 36

introduced by William John Macquorn Rankine in 1859

Answer 36

RANKINE

Question 37

absolute temperature scale like Kelvin, but it uses Fahrenheit-sized degrees instead of Celsius.

Answer 37

RANKINE

Question 38

system used to measure and quantify the temperature

Answer 38

SCALE