further mechanics Flashcards
1
Q
work done
A
force x distance
power x time
2
Q
power
A
work done / time
driving force x velocity at an instant
3
Q
ke
A
1/2 x m x v^2
4
Q
gpe / pe
A
mg x h
5
Q
relationship between pe and ke
A
pe gained = gpe lost
gpe gained = pe lost
6
Q
coburns equation
A
ke + gpe = wd contrib - wd resist
7
Q
momentum
A
momentum = mass x velocity
momentum is conserved
8
Q
impulse
A
impulse = mv - mu
impulse = f x t
direction to be +ve
9
Q
coefficient of restitution
A
speed of seperation / speed of approach
v2-v1/u1-u2
e= 0 velocities are same after
e= 1 loss in ke is 0
10
Q
3 dimensions
A
mass - m
length - l
time - t
11
Q
3 dimensions
A
mass - m
length - l
time - t
12
Q
force
A
mlt-2
13
Q
acceleration
A
lt-2
14
Q
velocity
A
lt-1
15
Q
momentum
A
mlt-1
