Kinetic and Potential Energy Stores | Improve Tuition | Tutors | Tuition | Tutoring | Tutor

Kinetic and Potential Energy Stores


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  • Anything which moves = energy in kinetic energy stores
  • Object speeds up = energy transferred to this store
  • Object slows down = energy transferred away from this store
  • Greater mass and faster an object is going =more energy in its kinetic energy store
  • E(k) = ½ mv²
  • Kinetic energy (j) = a half X mass (kg) X (speed)² (m/s) ²
  • Raised objects = energy stored in gravitational potential energy stores
  • an object in gravitational field = work done = transfer of energy to gravitational potential energy store
  • Higher the object = more energy transferred
  • E(p) = mgh
  • Gravitational potential energy (j) = mass (kg) X gravitational field strength (N/kg) X height (m)
  • Something falls = gravitational potential energy store → kinetic energy store
  • Falling object when no air resistance: energy lost rom the gravitational potential energy store = energy gained in kinetic energy store
  • Air resistance acts on all falling objects
  • Stretching = transfers energy to elastic potential energy stores if the limit of proportionality hasn’t been exceeded.
  • E(e)= 1/2 ke²
  • Elastic potential energy (j) = a half X spring constant (N/m) X (extension)² (m)²
  • How long have you…? (present perfect 4) Exercises


     

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    Use the information given to create questions beginning with ‘How long…?’

    • It is snowing.

    • The weather is shining.

    • John and Kate are married.

    • My brother has gone on holiday.

    • My aunty and uncle live in Canada.

    • My sister is a teacher.

    • I work at the chemist.

    • I’ve known Susan since I was a baby.

    • Jonathan is learning to speak to Mandarin.

     

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    Fill in the missing gaps in the sentences using the present perfect (=has/have + past participle)

    • I have known Kate a long time.

    • My brother has been playing the piano he was 11 years old.

    • My mum and dad on holiday to America. They

    gone since last Sunday.

    • I Ben and Emma since primary school.

    We to the same primary and secondary school.

    • My sister learning to speak French because she
    is going to France next month.

     

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    Use the appropriate words in the missing gaps.

    have you lived       lives      to

    has been       works        have known

    I have bought       have worked.

    • My sister in Spain. She is studying Spanish

    with her friend Rosie. I Rosie since I was 5.

    • Spencer like with Jamie. They have worked

    together for 2 years.

    • How long in Australia?

    • a new dress for prom.

    • He to Thorpe park.

     

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    Challenge: Create 4 of your own questions beginning with ‘How long……?’

    1.

    2.

    3.

    4.

     

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