Save
A level Physics
Module 3: Forces
3.2 Forces in action
Save
Share
Learn
Content
Leaderboard
Learn
Created by
Hysterical Stratagem
Visit profile
Subdecks (2)
Determining Centre of gravity practical
A level Physics > Module 3: Forces > 3.2 Forces in action
1 card
Investigating the motion of a ball in a fluid
A level Physics > Module 3: Forces > 3.2 Forces in action
1 card
Cards (16)
Net Force, F =
Mass
*
Acceleration
Newton
is defined as the force required to
accelerate
a
1
Kg mass by
1
ms^
-2
Examples of Forces =
Weight
= m*g
Friction
normal
force, (
contact
force)
upthrust
= in fluids
Tension
= in ropes
What is the resultant force?
A)
17N to the right
1
Drag is
proportional
to V^2
acceleration
is not
constant
Factors affecting drag =
Surface area
Speed
Acceleration in a fluid:
A)
acceleration = m*g
B)
accelerating at a decreasing rate as drag increases
C)
Terminal velocity
3
Forces on a slope:
A)
Mg * sin(0)
B)
Mg*cos(0)
2
Centre
of
gravity
is a point at which the entire
weight
of an object seems to
act
Centre
of
mass
is a point at which the entire
mass
of an a object seems to
act
The moment of a force is defined as the product of the force and the
perpendicular
distance from the pivot to the line of action
Moment
=
Force
*
perpendicular
distance
A force
couple
consists of two
equal
opposite forces acting in the same
plane
Torque
=
Force
*
distance
Triangle
of forces is only applicable if object is in
equilibrium
A)
No resultant force
1
Density
is defined as
mass
per
unit
volume
Density =
mass
/
volume
Pressure
is defined as
force
per
unit
area
Pressure =
Force
/
area
Pressure in a
fluid
Density = mass/Volume
A)
Mass = D*v
1
Archimedes'
Principle
States that the
upthrust
acting on a body submerged in a
liquid
is
equal
to the
weight
of the
liquid
that has been
displaced
Upthrust
=
weight
of water
displaced
,
m*g
therefore:
Upthrust
=
Density
*
volume
*
g
Principle of
Moments
An object will be in
equilibrium
if:
There is no net
moment
The
sum
of
clockwise
moments is equal to the
sum
of
anticlockwise
moments
What is F2?
A)
7.5N
1
See all 16 cards