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Physics
1. Forces and motion
Forces, shape, movement and momentum
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Created by
Millie Epstein
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Cards (13)
Different
forces
Gravitational force
:
weight
, there is a gravitational force of attraction between all objects with
mass
Electrostatic force: between two charged objects
Vector quantities
have
size
and direction
Vector quantities
examples:
displacement
,
velocity
,
acceleration
,
force
,
weight
Scalar
quantities have size but no direction
Scalar quantities
examples:
distance
,
mass
,
speed
, time
Resultant forces
of forces acting
along a line
: add them together
Friction
: a force opposing motion, the
kinetic energy
of the moving object is transferred to heat as friction force does
work
Force
=
mass
x
acceleration
Weight
=
mass
x
gravitational field strength
(
10 N/kg
)
Stopping distance
=
thinking
+
braking distance
Factors affecting stopping distance:
speed
,
mass
, road conditions,
reaction time