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GCSE AQA physics combined > Forces > Flashcards

Forces Flashcards

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1
Q

what is a vector

A

a quantity that has magnitude and direction

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2
Q

what is a scalar

A

a quantity that only has magnitude

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3
Q

give examples of scalars

A

temperature
mass
energy
speed
density
distance

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4
Q

give examples of vectors

A

force
weight
displacement
velocity
acceleration
momentum

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5
Q

what is a contact force

A

when the objects are touching

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6
Q

what is a non contact force

A

the objects are not touching

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7
Q

give examples of contact forces

A

friction
air resistance
tension
normal contact force
upthrust

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8
Q

give examples of non contact forces

A

gravitational force
electrostatic force
magnetic force

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9
Q

what is gravity

A

the force of attraction between all masses

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10
Q

what is the equation for weight

A

mass x gravitational field strength

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11
Q

what is the resultant force

A

A number of forces acting on an object may be replaced by a single force that has the same effect as all the original forces acting
together

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12
Q

what must be done to change the shape of an object

A

more than one force must be applied

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13
Q

what does elastically deformed mean

A

if the object returns to its original shape after the forces are removed

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14
Q

what does inelastically deformed mean

A

if the object does not return to its original form

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15
Q

what is the equation for force

A

spring constant x extension

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16
Q

elastic potential energy equation

A

0.5 x spring constant x extension squared

17
Q

what is distance

A

how far an object moves (scalar quantity)

18
Q

what is displacement

A

includes the distance the object has moved and the direction

19
Q

what is velocity

A

the speed of an object in a given direction

20
Q

what will the line look like on a distance time graph is the object is accelarating

A

the line will be curved

21
Q

what is the equation for acceleration

A

change in velocity / time taken

22
Q

what is newtons first law

A

the object will remain in the same state of motion unless acted upon by an external force

23
Q

what is inertia

A

the tendency of objects to continue in their state of rest

24
Q

what is newtons second law

A

The acceleration of an object is proportional to the resultant force
acting on the object, and inversely proportional to the mass of the
object

25
Q

what is the equation for force

A

mass x acceleration

26
Q

what is newtons third law

A

every action there is an equal opposite reaction

27
Q

what is the stopping distance

A

the sum of the distance the vehicle travels during the drivers reaction time

28
Q

what does the stopping distance depend on

A

thinking distance - distance travelled during the drivers reaction time
braking distance - distance travelled under the braking force

29
Q

what is the conservation of momentum

A

In a closed system, the total momentum before an event is equal to the total momentum after the event.

GCSE AQA physics combined (7 decks)

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