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Physics GCSE 2022 > Paper 1 - Energy > Flashcards

Paper 1 - Energy Flashcards

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1
Q

What are the energy stores

A
  • thermal
  • kinetic
  • gravitational
  • elastic potential
  • chemical
  • magnetic
  • electrostatic
  • nuclear
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2
Q

What is a system

A

A single object or group of objects

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3
Q

What happens when a system changes

A

Energy is transferred. Into or away from the system between different objects

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4
Q

What’s a closed system?

A

Where matter cannot leave or enter. The net change in the total energy of a closed system is always 0

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5
Q

What is work done

A

Energy transferred

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6
Q

When something moves it has…

A

…energy in its kinetic energy store

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7
Q

How does the kinetic energy of an object change as speed changes

A

Energy transferred to kinetic energy store as it speeds up, away from store as it slows down

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8
Q

What is the formula to calculate kinetic energy

A

Kinetic energy = 0.5 x mass x speed^2

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9
Q

What is energy transferred measured in?

A

Joules (J)

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10
Q

What is the basic unit for mass

A

Kilograms (kg)

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11
Q

What is the basic unit of measurement for distance?

A

metres (m)

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12
Q

What is the basic unit of measurement for speed ?

A

Metres per second (m/s)

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13
Q

Lifting an object requires…

A

Work

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14
Q

How does the transfer of energy to an objects gravitational potential energy store change with height

A

Higher object is lifted, more energy is transferred to it

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15
Q

What is the amount of energy in an objects gravitational potential energy store dependant on?

A
  • height
  • mass
  • gravitational field strength
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16
Q

What is the formula to calculate the amount of energy in an objects gravitational potential energy store

A

g.p.e. = mass x gravitational field strength x height

17
Q

What is the unit of measurement for gravitational field strength

A

N/kg

18
Q

What happens when you stretch or squash an object

A

Energy is transferred to its elastic potential energy store

19
Q

What is the equation to find the amount of energy in an objects elastic potential energy store

A

Elastic potential energy = 0.5 x spring constant x extension^2

20
Q

What is the unit of measurement for spring constant

A

(N/m)

21
Q

What is specific heat capacity?

A

The amount of energy needed to raise the temperature of 1kg of a substance by 1°C

22
Q

What is the equation involving specific heat capacity

A

Change in thermal energy = mass x specific heat capacity x temperature change

Physics GCSE 2022 (2 decks)

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