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Flashcards in Equations Deck (16)
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1

What is the equation for speed?

Speed=Distance/time
S=D/T

2

What are the Equations for average speed?

1. Total Distance/Time. Sav=td/t
2. (Initial speed+final speed)/2. Sav=u+v/2

3

What is the equation for rate of change of speed?

(Final speed-Initial speed)/Time

(Delta)S=(v-u)/t

4

What is the equation for velocity?

Change in displacement/Time

V=(delta)s/t
=v-u/t

5

Equation for average velocity

Vav=(v+u)/2

6

What are the equations for resultant force?

Fr=MxA
Fr=T+D (for horizontal motion remember that force is vector so remember negative D)
Fr=T+W(For vertical motion, remember that force is vector, so remember negative for w)

7

What is the equation for weight?

W=mg

8

What is the equation for density?

d=m/v

9

What is the equation for hookes law?

f=ke

10

What is the equation for pressure?

P=f/a

11

What is the equation for efficiency?

Efficiency= Useful E/Total E

12

What is the equation for power?

P=w.d/t
*Note that w.d=energy transferred

13

What is the equation for kinetic energy?

K.E=1/2mxv2

14

What is the equation for gravitational potential energy?

g.p.e=mxgxh

15

What is the equation for moments when d is a perpendicular Distance?

M=fxd

16

What is the equation for moments for a system in rotational equilibrium?

f1xd1=f2xd2