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Flashcards in Mechanics Deck (17):
1

SUVAT

v=u+at
s=(u+v)/2 t
v^2=u^2+2sa
s=ut+0.5at^2

2

velocity

the rate of change of displacement

3

acceleration

the rate of change of velocity

4

displacement

average velocity*time

5

change in velocity

acceleration*time

6

terminal velocity

forces are balanced (no resultant force)
weight never changes
surface area presented + velocity affect it

7

relative velocity

speed of an object from a perspective

8

fundamental forces

nuclear strong force
nuclear weak force
gravity (weakest)
electromagnetic (all others observed)

9

newton's 3rd law

all forces are interactions between objects
(same magnitude of force in opposite directions
same type of force)

10

Newton's first law

if there is no resultant force, there will not be a change in velocity

11

Newton's second law

F=ma

12

linear momentum

=m*v (kgms^-1)
conservation of momentum

13

impulse

sudden change in momentum for an object/ the force on an object and the time it is applied (kgms^-1)
Impulse=dP=force*time
=m*dv

14

Work done

force*distance
FSCosΘ
(if energy gained, positive and vice versa)

15

Power

work done in 1 s
dW/dt=F(ds/t) P=Fv

16

efficiency

useful work done/input energy=useful output power/input power

17

circular motion

centripetal force
a=v^2/r=4π^2r/T^2