Key To Physics Vocabulary

Question 1

Force

Answer 1

Push or pull that gives you energy

Question 2

Friction

Answer 2

Force that one surface exerts on another, when the to rub against each other. Eventually causes motion to stop

Question 3

Sir Isaac Newton

Answer 3

During 1665-1666 He developed the three laws that describe all states of motion

Question 4

Momentum

Answer 4

Product of an objects mass times velocity

Question 5

Inertia

Answer 5

Moving objects tend tendency to continue in straight lines Or of a stationary object to remain in place

Question 6

2nd law of motion

Answer 6

Law that shows how mass force and Acceleration are related. (F=m X a)

Question 7

Rolling friction

Answer 7

Friction produced by wheels or rolling over surfaces

Question 8

Fluid friction

Answer 8

Friction exerted by water, oil and air as an object moves through it

Question 9

Gravity

Answer 9

Force that pulls objects toward each other

Question 10

Sliding friction

Answer 10

When solid surfaces slide over each other

Question 11

Unbalanced force

Answer 11

A force that changes the direction of an objects movement

Question 12

Balanced force

Answer 12

A force that does not change the direction of an object movement

Question 13

1st law of motion

Answer 13

An object at rest will remain at rest and an object in motion will continue moving at a constant speed unless acted upon by an unbalanced force

Question 14

Weight

Answer 14

Measure of the force of gravity on an object (2nd law of motion)

Question 15

Law of universal gravitation

Answer 15

Gravity acts between objects everywhere in the universe

Question 16

Law of conservation of energy

Answer 16

The rule stating matter or energy is not created or destroyed merely changed from one form to another

Question 17

3rd law of motion

Answer 17

If one object exerts a force on another object then the second object exerts a force of equal strength in the opposite directions

Question 18

Air resistance

Answer 18

An upward force that increases with velocity and surface area so that a falling object falls more slowly

Question 19

Motion

Answer 19

Change in position over time

Question 20

Form of reference

Answer 20

Background Or point that is assumed to be stationary and is used for comparison when motion is described. Example a car drives down the street. The person inside the car has a different frame of reference that the person watching the Car pass

Question 21

Speed

Answer 21

Rate at which an object moves

To calculate speed=distance/time

Question 22

Velocity

Answer 22

Speed in a given direction. Traveling 60 KM/ hour north

Question 23

Acceleration

Answer 23

Rate of change in velocity speed may change or direction may change if something accelerates