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Moments

• Pivot = point around which rotation happens (middle of a seesaw)

• Moment = turning effect of a force
• If a force acts on something which has a pivot, it causes a moment.
• Moment (Newton Metres Nm) = force (Newtons N) X perpendicular distance (metres m)
• M= F X d
• Moments are balanced if: anticlockwise moments = clockwise moments

How long have you…? (present perfect 4) Exercises

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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“Every accomplishment starts
With the decision to try.” Gail Dever

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