Forces And Motion

Question 1

Velocity

Answer 1

An objects speed and direction. Average velocity is calculated from displacement/time while instantaneous velocity had to be measured at a specific moment in time.

Question 2

Tension Forces

Answer 2

Two or more forces that pull in opostite directions on an object, as if they were pulling the object apart.

Question 3

Mass

Answer 3

The anount of matter in an object, measured in kg in the SI system of units.

Question 4

Displacement

Answer 4

The difference between the starting and ending point of an object

Question 5

Simple machine

Answer 5

A device that makes work easier by reducing the force (but increasing the application distance) or reducing the distance (but increasing the force).

Question 6

Average Speed

Answer 6

A measure of how fast an objects postion changes, calculated from distance/time

Question 7

Gravitational Force

Answer 7

The force of attration of all masses toward each other due to gravitational pull

Question 8

Strong nuclear force

Answer 8

A force that holds protons and neutrons together in the nucleus

Question 9

Direction

Answer 9

The orientation of the movement of an object, often in a compass direction

Question 10

Net force

Answer 10

The vector sum of all forced acting on an object.

Question 11

Free Body Diagram

Answer 11

A diagram showing all of the forces acting on an object.

Question 12

Pulley

Answer 12

A simple machine that can change the direction and size of a force

Question 13

Meters (m)

Answer 13

The unit for distance in the metric system

Question 14

Position

Answer 14

An objects location at a given moment in time

Question 15

Speed vs. Time Graph

Answer 15

A graph with speed on the y-axis and time on the x-axis, the slope of the line equals acceleration

Question 16

Weak Nuclear Force

Answer 16

A force that resists particle decay in the nucleus

Question 17

Work

Answer 17

The process by which energy is changed in a system. Calculated from the product of force and distance. Object must move in order for work to have been done.

Question 18

Newton’s Third Law

Answer 18

The law that for every action there is an equal and opposite reaction.

Question 19

Contraction Forces

Answer 19

Two or more forces that pull inward on an object, as if they were trying to compress the object into a smaller space.

Question 20

Center of Mass

Answer 20

The point at whuch an object will balance.

Question 21

Vector

Answer 21

A quantity with both magnitude (size) and direction.

Question 22

Newton’s Second Law

Answer 22

The law that greater masses require a greater force to achieve the same acceleration, F=ma

Question 23

Mechanical Advantage

Answer 23

The amplification of a force by increasing the input distance in a simple machine. The output force divided by the input force equals the input distance divded by the output distance.

Question 24

Acceleration vs. Time Graph

Answer 24

A graph with accleration on the y-axis and time on the x-axis

Question 25

Electromagnetic Force

Answer 25

Interactions (pushed and pulls) of electricity charged particles with other charged particles and magnetic poles

Question 26

Force

Answer 26

An interation (push or pull) of one object with another that resists other forces or causes acceleration

Question 27

Lever

Answer 27

A simple machine with a fulcrum, an output force or weight, and an applied force

Question 28

Acceleration

Answer 28

A measure of how quickly something changes its speed or direction, calculated from change in velocity/time

Question 29

Position vs. Time Graph

Answer 29

A graph with position on the y-axis and time on the x-axis, the slope of the line equals speed.

Question 30

Newtons’s First Law / The Law of Inertia

Answer 30

The law that objects resist changes in their state of motion

Question 31

Gravity

Answer 31

The force of attraction of all masses toward each other due to gravitational pull

Question 32

Inertia

Answer 32

The tendency to resist changes in state of motion

Question 33

Distance

Answer 33

The length of the path traveled by an object