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1m/s².
acceleration of
mass and
that will give a 1kg
Newton = the force
Newton's 3rd Law Newton's 2nd Law Newton's 1st Law
· For every action there ·isFan
= ma · If there is no resultant
equal and opposite reaction. force, a body remains at rest
· resultant force (N) = mass
or maintains a constant
(kg) x acceleration (m/s²)
velocity.
Newton's Laws…read more

Slide 3

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Non-Linear Motion
Objects experience drag when moving through a
fluid.
F = ½ Cd A v²
F = drag force
= density of fluid
Cd = drag coefficient
A = cross-sectional area
v = velocity
Terminal velocity: when frictional force = driving
force.
Mass = amount of matter measured in kg.
Weight = force caused by gravity, measured in
N.
W = mg…read more

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Centre of Gravity
The centre of gravity is the point at which the
entire weight appears to act.
To find the centre of gravity.
1. Hang object freely.
2. Draw vertical line using plumb
bob.
3. Repeat.
4. Where the lines cross = centre
of gravity.
An object is more stable with a low
centre of gravity and wide base
area.…read more

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Moments
the turning effect of a force
moment of a force = force x perpendicular distance
from pivot
M (Nm) = F (N) x d (m)
When a body is in equilibrium...
anticlockwise moments = clockwise moments…read more

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Couples
A couple is a pair of forces of
equal size which act parallel to
each other but in opposite
directions.
Don't cause linear force but do
produce a turning effect
(torque).
the size of the torque depends
on the size of forces & distance
between
torque them. =
of a couple
one of the forces x perpendicular distance
between force…read more

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