Forces & Motion

Front 1

Gravitational force

Back 1

• causes moons to orbit planets
• causes the planets to orbit the sun
• causes artificial satellites to orbit the Earth
• causes comets to orbit the sun

Front 2

Comet

Back 2

• a celestial object
• a nucleus of ice and dust
• when near the sun, a ‘tail’ of gas and dust particles pointing away from the sun.

Front 3

Planet

Back 3

• a celestial body
• elliptically orbiting a star,
• large enough to clear its orbit

Front 4

Moon

Back 4

• natural satellite of a planet

Front 5

Comet

Back 5

• a celestial object
• a nucleus of ice and dust
• when near the sun, a ‘tail’ of gas and dust particles pointing away from the sun.

Front 6

Comet

Back 6

• a celestial object
• a nucleus of ice and dust
• when near the sun, a ‘tail’ of gas and dust particles pointing away from the sun.

Front 7

Comet

Back 7

• a celestial object
• a nucleus of ice and dust
• when near the sun, a ‘tail’ of gas and dust particles pointing away from the sun.

Front 8

Comet

Back 8

• a celestial object
• a nucleus of ice and dust
• when near the sun, a ‘tail’ of gas and dust particles pointing away from the sun.

Front 9

The universe

Back 9

A large collection of billions of galaxies

Front 10

Scalar quantity

Back 10

Quantity containing a magnitude (e.g. force)

Front 11

weight

Back 11

weight (W) [N] = mass (m) [N] × gravitational field strength (g) [N/kg]

Front 12

force

Back 12

force (F) [N] = mass (m) [g] × acceleration (a) [m/s²]

Front 13

momentum

Back 13

momentum (p) [kg•m/s] = mass (m) [kg] × velocity (v) [m/s]

Front 14

change in momentum, impulse

Back 14

change in momentum (Δp) [N•s] = force (F) [N] × time (t) [s]

Front 15

spring constant

Back 15

spring constant (k) [N/mm] = load force (F) [N] / extension length (E) [mm]

Front 16

Galaxy

Back 16

a large collection of billions of stars

Front 17

Our solar system

Back 17

Milky Way galaxy

Front 18

Elastic behaviour

Back 18

Ability of a material to recover its original shape after the forces causing deformation have been removed.

Front 19

Point which the weight of a body acts through

Back 19

Centre of gravity

Front 20

Newton's first law

Back 20

A body will remain in inertia unless acted on by a net force

Front 21

Newton's second law

Back 21

Any force will produce an equal and opposite reaction

Front 22

Friction

Back 22

Force that opposes motion

Front 23

Effect of a force

Back 23

Change in

• speed
• shape
• direction

Front 24

Vector quantity

Back 24

Quantity containing a magnitude and direction