Topic 2 Flashcards
(27 cards)
Terminal Velocity
Objects falling through fluid reach terminal velocity = resultant force acting on it is 0 and moving at constant pace
Define Proportional
Directly linked
Inversely Propportional
Opposite = negative gradient
Force=
Mass x Acceleration
Define Inertia
Remaining unchanged
Define Inertial Mass
A measure of how difficult it is to change the velocity of an object
For every action there is an…
Equal and opposite reaction
Momentum
Measure of how much motion an object has
All moving objects have momentum
Momentum (p)=
Mass x Velocity
P=MxV
Conservation of Momentum
In a collision or explosion, momentum is conserved.
Momentum before =
Momentum after
Total Stopping distance=
Thinking distance + braking distance
Braking distance =
Stopping distance - thinking distance
Faster speed =
bigger stopping distance
Define Force
Rate of change on momentum
Force (f) =
MxV - MxU
—————
t
If forces act opposite, you…
Subtract them
If forces act the same, you…
Add them
Newton’s First Law
Law of Inertia
When an object stays at rest as it is in motion
(stays in one spot whilst in motion)
What is the Law of the Conservation of Energy?
Energy cannot be created or destroyed - it can only b transferred from stores
Energy Stores
Thermal Energy Nuclear Energy Kinetic Energy Elastic Potential Energy Gravitational Energy Chemical Energy
Energy Transfers
By heating By electricity By forces By sound By light
Equation for Energy Efficiency
Useful Output Energy
—————————-
Total Input Energy
Equation for Power
Energy
———-
Time
GPE
Gravitational Potential Energy
