Mechanics

?
What is distance?
How far you have covered (meters)
1 of 58
What is displacement?
How far you're from the beginning point
2 of 58
What is the equation for speed?
Total displacement / time take
3 of 58
What is acceleration?
Rate of change of velocity (speed)
4 of 58
What is the equation for acceleration?
Change in velocity / time taken
5 of 58
What does the area under the velocity time graph give?
Total displacement in that time
6 of 58
What are constant acceleration equations?
Standard set of letters used for motion of an object moving in a straight lines with constant acceleration
7 of 58
What are the constant acceleration equations?
v=u+at, s=1/2(u+v)t, s=ut + 1/2at^2, s=vt-1/2at^2, v^2=u^2 + 2as
8 of 58
What is the method for the constant acceleration formulas?
i. List what you know ii. Find the equation required iii. Solve equation to find info
9 of 58
How do you find the magnitude of the displacement covered?
Pythagoras
10 of 58
How is a bearing measured?
From the point north line clockwise
11 of 58
What is the magnitude of displacement?
Distance
12 of 58
How do you find displacement from vectors?
Add them
13 of 58
What is the displacement of vectors called?
The position vector
14 of 58
What is the magnitude of velocity?
Speed
15 of 58
What is the equation of the average velocity?
Displacement from starting point / time taken or Change in position vector / time taken
16 of 58
How do you calculate the resultant velocity?
end on end - then Pythagoras, cosine or resolving
17 of 58
What is acceleration when there is constant velocity?
0
18 of 58
What is the method for finding the resultant force?
i. Scale drawing ii. Calculate with trig
19 of 58
What are coplanar forces in equilibrium?
Forces acting on the same plane eq flat surface
20 of 58
What is weight?
An object being pulled vertically down
21 of 58
What is tension?
A pulling force eq rope pulling
22 of 58
What is thrust?
A pushing force
23 of 58
What are assumptions with weight, thrust and tension?
All objects thought of as a point/particle, therefore all forces act on the same point (no thrust ect)
24 of 58
What happens as pulling and friction force increases?
The object remains in equilibrium
25 of 58
What happens when the limit to which the surface can resist is exceeded?
The object moves, and accelerates
26 of 58
What is the object when it is just about to move?
Limiting equilibrium
27 of 58
What is the maximum friction force proportional to?
The normal reaction
28 of 58
What does friction force equal?
µR
29 of 58
What is µ?
Coefficient of friction
30 of 58
What is the coefficient of friction?
A required roughness of the interface between 2 surfaces
31 of 58
What happes as µ gets bigger?
The roughness of the surface increases
32 of 58
What will mgsinQ cause when a box is on a slope?
acceleration down the slope
33 of 58
What does it mean if T = mgsinQ?
no acceleration
34 of 58
What does it mean if T>mgsinQ?
Acceleration up the slope
35 of 58
What does it mean if T
Acceleration down the slope
36 of 58
What would happen in the absence of air resistance?
All objects fall to earth with the same constant acceleration
37 of 58
What is the N2L formula?
F=mxa
38 of 58
What are the assumptions of newtons 2nd law of motion?
The object is thought of as a particle (all forces acting on one point), Any cables treated as 'light' and cables in extensible
39 of 58
What is Newtons third law?
'Action + reaction are equal and opposite'
40 of 58
What are assumptions with pegs and pulleys?
Light string and smooth peg
41 of 58
What do you assume if there is a smooth surface?
No friction
42 of 58
What is the equation for momentum?
Mass x velocity
43 of 58
What is the momentum before and after?
Equal
44 of 58
What does coalesce mean?
Join together
45 of 58
What is the equation of momentum if there is a force?
Force x time
46 of 58
What happens if an object moving in a straight line at a constant velocity has a force acting on it?
The momentum will change
47 of 58
What is the acceleration if an object is thrown upwards?
-9.8ms-2
48 of 58
What is the acceleration if an object is dropped downwards?
9.8ms-2
49 of 58
What is the only force on free falling objects?
Weight
50 of 58
What are assumptions of projectiles?
Object is modelled as a particle and no air resistance/spin
51 of 58
Where is the minimum speed of a projectile?
At the top
52 of 58
How should you prepare for projectiles?
Set up equations: v=u+at & s=ut+1/2at^2
53 of 58
How should you work out time of flight?
Bottom of 'S' = 0
54 of 58
What is time of flight?
Distance vertically
55 of 58
How should you work out the range of a projectile?
Top line of 's'
56 of 58
How can you find out where it starts?
Top = 0
57 of 58
How do you find out the maximum point?
Bottom of V = 0
58 of 58

Other cards in this set

Card 2

Front

What is displacement?

Back

How far you're from the beginning point

Card 3

Front

What is the equation for speed?

Back

Preview of the front of card 3

Card 4

Front

What is acceleration?

Back

Preview of the front of card 4

Card 5

Front

What is the equation for acceleration?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Mathematics resources:

See all Mathematics resources »See all Mechanics resources »