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Physics Year 1 > Mechanics Beginning-Projectiles > Flashcards

Mechanics Beginning-Projectiles Flashcards

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1
Q

Scalar Quantaties

A

Temperature, mass, speed, distance, voltage

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2
Q

Vector Quantities

A

Velocity, acceleration, displacement, forces

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3
Q

what does t stand for

A

time

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3
Q

what does a stand for

A

acceleration

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3
Q

What does v stand for

A

final velocity

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4
Q

what does s stand for

A

displacement

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4
Q

what does u stand for

A

initial velocity

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4
Q

what does F stand for

A

Force

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5
Q

what does d stand for

A

distance

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6
Q

what does m stand for

A

mass

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7
Q

what does W stand for

A

weight

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8
Q

what does g stand for

A

gravitational field strength

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9
Q

units for g

A

ms-2 OR Nkg-1

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10
Q

units for F

A

N

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11
Q

units for W

A

N

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12
Q

units for m

A

kg

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13
Q

units for s and d

A

m

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14
Q

units for v and u

A

ms-1

15
Q

units for a

A

ms-2

16
Q

units for t

A

s

17
Q

What is Newton’s 1st law

A

An object remains at rest or in uniform motion unless acted on by a force

18
Q

What is Newton’s 2nd law

A

F=ma

19
Q

What is Newton’s 3rd law

A

For every interaction between two objects there is an equal and opposite reaction

20
Q

When does object reach terminal velocity

A

When air resistance=weight

21
Q

Example of Newton’s 3rd law pair

A

Football on ground:
-Ball presses down on ground
-Ground reacts to ball
-Earth’s gravity acts on ball
-Ball’s gravity acts on earth

22
Q

How must Newton’s 3rd law pairs be equal

A

In type and magnitude

23
Q

How must Newton’s 3rd law pairs be opposite

A

In direction and object it is acting on

24
Q

How to find centre of mass

A

Suspend objects and hang plum lines

25
Q

What is the centre of mass

A

Point where mass of an object is thought to be concentrated

26
Q

Why will object fall over

A

When centre of mass goes over base of the object… AND WHEN THERE IS AN UNBALANCED MOMENT

27
Q

What is the principle of moments

A

The clockwise moment is equal to the anticlockwise moment

28
Q

How to resolve vectors

A

trigonometry

29
Q

gradient on distance time graph=

A

speed

30
Q

gradient of displacement time graph=

A

velocity

31
Q

gradient of velocity time graph

A

acceleration

32
Q

area under velocity time graph=

A

displacement

32
Q

what is gravitational field strength on earth

A

9.81ms-2

33
Q

what is force vertical on block on ramp

A

weight

34
Q

force parallel to block on ramp and opposite to direction of motion

A

friction

35
Q

what is instantaneous speed

A

speed at particular instant- found using tangent to graph

35
Q

What is average speed

A

total distance/total time

35
Q

force perpendicular to block on ramp and upwardsish

A

normal contact force

36
Q

Here you go, have a break well done

A

https://youtu.be/nDVoMSObJ6s?list=PLuMrAQNtOpsoisWnoodshTKnVUilP0Nsq

Physics Year 1 (5 decks)

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