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Flashcards in Equation cards Deck (43)
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1

Vectors - Resolving a force into its horizontal component?

Fx=Fcosθ

2

Vectors - Resolving a force into its vertical component?

Fy=Fsinθ

3

Suvat equation beginning with v?

v = u + at

4

Suvat equation beginning with s, and using v?

s = 1/2 ( u + v ) t

5

Suvat equation beginning with s, using a?

s = ut + 1/2 at^2

6

Suvat equation beginning with v^2?

v^2 = u^2 = 2as

7

Extra suvat equation, without u in it?

s = vt - 1/2 at^2

8

Rules for using suvat?

Constant acceleration, moving in a straight line

9

What do the symbols stand for in suvat?

s=displacement
u=initial velocity
v=final velocity
a=acceleration
t=time taken for the change in velocity

10

Equation for force?

force = mass x acceleration

11

Equation for weight?

weight = mass x gravity

12

Force equation using momentum?

force = change in momentum/change in time

13

Momentum equation?

momentum = mass x velocity

14

Power/energy efficiency equation?

useful output energy/total input energy ( x 100% )

15

What is the moment of a force?

moment = force x perpendicular distance of the line of action of force from the axis or point of rotation

16

What is the torque of a force?

torque = one of the forces x perpendicular separation between the forces

17

Density equation?

density = mass/volume

18

Pressure equation?

pressure = force/area

19

Pressure in liquids equation?

pressure = height of the liquid column x density of the liquid x gravity

20

Work done equation?

work done = force x distance moved in direction of the force

21

Work done equation using an angle?

work done = F x cos θ

22

Power equation?

Power = work done/ time taken

23

Power equation using speed?

Power = force x speed

24

Restoring force exerted by the spring on that end?

Force = the spring constant x the displacement of the springs end from its equilibrium position

25

Energy for springs using force?

Energy = 0.5 x force applied x the extension

26

Energy for springs using the spring constant?

Energy = 0.5 x spring constant x extension^2

27

Stress equation?

Force load/area

28

Strain?

extension/length

29

Young modulus?

stress/strain

30

Charge?

Change in charge = current x change in time