Forces Y8

Question 1

Force

Answer 1

An action that can cause acceleration, deceleration, or change in shape

Question 2

Unit for measuring force

Answer 2

Newtons (N)

Question 3

Symbol for force

Answer 3

Upper-case F

Question 4

Weight

Answer 4

Force due to gravity, points vertically downward (mostly)

Question 5

Tension

Answer 5

Force that acts in the direction of a rope or similar object

Question 6

Friction

Answer 6

Force that acts opposite to the direction of motion when two surfaces are moving and in contact

Question 7

Air Resistance

Answer 7

Force that acts opposite to the direction of motion in air

Question 8

Normal Force

Answer 8

Force that acts against an object pushing against the surface, points perpendicular to the surface

Question 9

Newton’s Third Law

Answer 9

If Body A exerts a force on Body B, Body B exerts an equal and oppositely directed force on Body A

Question 10

Force pair

Answer 10

Two forces that are equal and oppositely directed, act on different bodies and are the exact same type of force.

Question 11

Applied Force

Answer 11

Any push or pull that doesn’t fit into one of the other descriptions of forces

Question 12

Upthrust

Answer 12

The force that makes objects float

Question 13

Contact forces

Answer 13

Forces that require physical contact between two bodies

Question 14

Non-contact forces

Answer 14

Forces that do not require physical contact between bodies

Question 15

Balanced forces

Answer 15

Forces that when added up have zero resultant force and cause no acceleration

Question 16

Resultant Force

Answer 16

Sum of all forces acting on a body

Question 17

Newton’s First Law

Answer 17

A body will remain at rest or continue at constant velocity if there are no external forces acting on it

Question 18

Unbalanced forces

Answer 18

Forces that when added up give a non-zero resultant force and cause acceleration, deceleration, or change in shape

Question 19

Newton’s Second Law

Answer 19

Resultant Force = Mass x Acceleration

Question 20

Newton meter

Answer 20

Device that measures force in Newtons

Question 21

Stopwatch

Answer 21

Device that records the time passed in seconds

Question 22

Speed

Answer 22

Distance divided by time

Question 23

Unit of speed

Answer 23

Meters per second, m/s

Question 24

Velocity

Answer 24

Displacement divided by time

Question 25

Displacement

Answer 25

Change in position of an object

Question 26

Distance-Time Graphs

Answer 26

Graphs that show the journey of an object by plotting distance and time on separate axes

Question 27

Steepness of slope on a distance-time graph

Answer 27

Indicates the speed of the object

Question 28

Horizontal line on a distance-time graph

Answer 28

Indicates a stationary object

Question 29

Y-axis on a distance-time graph

Answer 29

Distance

Question 30

X-axis on a distance-time graph

Answer 30

Time