Module 2 Part 2: Forces Acceleration and Energy Flashcards
what is the law of conservation of energy
Energy is never created or destroyed it only changes between one form and another
what types of energy are there (3)
kinetic energy
potential energy
Electromagnetic energy
list types of kinetic energy (3)
thermal
sound
linear kinetic
list types of potential energy (3)
chemical
gravitational
elastic
list types of Electromagnetic energy (3)
light
Gamma
x-ray
what is kinetic energy
moving energy
what is potential energy
stored energy
what is the symbol for kinetic energy
K
what is the equation for Kinetic energy
K = 1/2 mv²
what is the unit for kinetic energy
Joule(J)
what is the equation for velocity using kinetic energy
v = √(2K/m)
how is kinetic energy in an object changed (2)
to speed up is to increase in kinetic energy
to slow down is to decrease in kinetic energy
what is work
a change in energy
what is the symbol for work
W
what is the equation for work (3)
W = ΔE
W = Fₙₑₜs
W =mg
what is work measured in
Joules(J)
what is gravitational potential energy
energy an object possesses because of its position in a gravitational field
what is the symbol for gravitational potential energy
U
what is the equation for change in gravitational potential energy
ΔU = mgΔh
what is said about the relationship between work and gravitational potential energy (2)
Objects raised against a gravitational force need work to be applied to do so (W = mg)
When objects fall in the direction of the field, work is done by the field
what is the relationship between gravitational potential energy and kinetic energy when an object is lifted
ΔUₜₒₚ = ΔKᵦₒₜₜₒₘ
what is power
the rate at which work is done
what is the symbol of power
P
what is the equation for power (2)
P = W/t P = ΔE/t
what is unit for power
Watt (W)
