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Maths A level > AS Mechanics > Flashcards

AS Mechanics Flashcards

1
Q

What is a particle?

A

a body whose dimensions, except for mass are negligible

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2
Q

Where is the mass concentrated in a particle

A

concentrated at a single point

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3
Q

Which forces can be ignored when regarding a particle?

A

Rotational forces
Air resistance

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4
Q

What is a bead?

A

A particle with a hole in it for threading on a wire or a string

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5
Q

Where is tension on a bead?

A

Tension is the same either side

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6
Q

What is a wire?

A

Rigid thin strip of metal

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7
Q

What modelling assumption is made about wires?

A

Treated as one dimensional

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8
Q

What is a rod?

A

An object whose mass is concentrated along a line
All dimensions but one are negligible

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9
Q

What is meant by the term negligible?

A

small enough that it can be ignored

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10
Q

What is a uniform rod?

A

One which equal lengths have equal masses - means that the weight can be taken from the centre

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11
Q

What is a light object?

A

One whose mass in negligible

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12
Q

What is a lamina?

A

A flat body having area but negligible thickness

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13
Q

What is a uniform lamina?

A

One which equal areas of lamina have equal masses

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14
Q

What is a peg?

A

A pin from which a body can be suspended or rested

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15
Q

Is a peg dimensionless?

A

yes

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16
Q

Difference between a smooth and rough peg

A

Smooth peg has no friction
Rough peg would have a frictional force

17
Q

What is an inextensible/inelastic string and what does this mean for particles attached?

A

one that doesnt stretch and length never changes
Acceleration is the same for all particles attached to a taut string

18
Q

What is meant by a smooth surface?

A

One which offers no resistance to motion eg no friction

19
Q

What is meant by a rough surface?

A

One where friction has to be taken into account

20
Q

What is a smooth pulley and what does this mean for tension?

A

One with no friction in its bearings - tension in the string will be equal on the two sides of the pulley

21
Q

What is a plane surface?

A

A completely flat surface

22
Q

What is weight?

A

force acting on an object due to gravity

23
Q

What is resistance?

A

any force that opposes the motion of an object

24
Q

What is friction?

A

type of resistance force caused when objects are trying to slide against one another

25
Q

What is reaction force ?

A

when two objects are in contact, each exert a reaction force on the other

26
Q

What is the direction of a reaction force?

A

perpendicular to the surface on contact

27
Q

What is a driving force?

A

force applied to an abject to cause it to move

28
Q

What is braking force?

A

force applied to a moving object with the intention of slowing it down

29
Q

What is tension?

A

force produced by an object that prevents it being stretched

30
Q

What is thrust / compression?

A

force produced by an object that prevents it being squashed

31
Q

What is lift?

A

an upwards force that acts on an aircraft enabling it to take off

32
Q

What is buoyancy?

A

an upwards force acting on an object floating on water that stops it from sinking

Maths A level (2 decks)

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