physics -energy stores cp8 p2 Flashcards

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1
Q

kinetic energy is

A

any moving object

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2
Q

thermal energy is

A

anything warm

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3
Q

chemical energy is found in

A

food
fuels
batteries

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4
Q

elastic potential energy is

A

Energy in stretched or squashed objects

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5
Q

electrostatic energy is

A

: Energy in charged objects (+ve) or (-ve)

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6
Q

magnetic energy is

A

When magnets attract or repel each other

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7
Q

nuclear energy is

A

Energy stored in the nucleus of atoms

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8
Q

gravitational potential energy

A

Object up in the air or up hill

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9
Q

4 types of energy transfers

A
  1. Mechanically: this must involve a force
  2. Electrically: Energy flows in wires
  3. Heating: heat moves from hot objects to cold ones
  4. Radiation: by waves eg light and sound
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10
Q

what is energy conservation

A

Energy cannot be created or destroyed, it can only be
transferred from one store into another

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11
Q

wasted energy

A

Appliances often waste energy as HEAT and SOUND, this
energy spreads out into the atmosphere

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12
Q

what is work done

A

-Work is done when a force makes an object move in the direction of the force.
-Work done is EQUAL to the energy transferred.
-Work is measure in Joules,

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13
Q

what is power

A
  • amount of work done in a
    time of 1 Second
    -energy transferred in 1
    second
    -Objects which do their
    work fast are powerful
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14
Q

work done when climbing stairs
CORE PRACTICAL

A
  1. Weigh yourself on scales in Newtons
  2. Measure the vertical height of the stairs (m)
  3. Walk up the stairs and time how long it takes (s)
  4. Calculate work = Force x distance
  5. Calculate Power = work done ÷ time
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15
Q

work done and power when moving a box

A
  1. Measure the force you use using a Newton meter (N)
  2. Measure distance moved (m)
  3. Use a stopwatch to record how long it took you (s)
  4. Calculate work = force x distance moved
  5. Calculate the power = work done ÷ time
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16
Q

no work done is when

A

No work is done if you are not moving

17
Q

Lifting objects vertically

A

-The force moved vertically
is the objectsweight.
-WEIGHT is EQUAL to
FORCE
-The amount of work done
lifting an objects is
also EQUAL to the amount
of Gravitational Potential
Energy (J) the object gains by being lifted up

18
Q
A