Hookes Law w Sheet Answers

7/24/2019 Hookes Law w Sheet Answers

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Name___________________________ IGCSE-Hookes Law Worksheet Answers

1.1.

1 | P a g e

F = k . x

Therefore k = F/x..

k1 = k2 therefore

F1/x1=F2/x2

100/10 = m /20

10 m = 2000. M = 200

Or

If 100g causes an extenti

of 10cm than 200g should

cause an extension of 20c

= 20cm !10cm = 10cm

"#ring 1 = $0cm !10cm = 200cm

"#ring 2

ans


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1.2.

1.3.

1..

2 | P a g e

ans

1%.2 cm & 2.1 = 1'.$


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1.!.

3 | P a g e

Mass is the

same

Weight is the

same

Volume is

ans


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1.".

| P a g e

From gra#h( )00* o

#lanet + has a mass

)0 kg.

Mass does not chang

From the gra#h )0kg

has a mas of 200*

#lanet ,

ans


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2.1.

! | P a g e

= 1-.) cm 1% cm

= 1.)cm

From gra#h an exten

of 1.) =$.% *

ans

F = * '* o##. irection! sutract3

= 2* left

2N let

F = m x a

a = F/m = 2/ 0.%kg = )m.s!2

X =1

X =

1

X =

1

X =

1

X =

1

X =

0.8

X =

0.8

X =

0.8

X = 1

X=

1.2

X =

0.8

X =

0.8

X =

0.8

X = 1

X=

1.2

X =

1.1

X =

1.1

X =

1.1

X =

1.1

X=

1.1

"tudent 4


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2.2.

" | P a g e

The extension for an increase of 0.% * is costant for student

5(6 and ut is not al7a8s constant for student 4

1cm

.! cm " 1cm = #.!

e$tensti


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# | P a g e


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$ | P a g e


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2.3.

% | P a g e

directl% &ro&ortional

Newton

From the gra#h a load of 2.% * causes an

extension of 2%mm. The total length of the s#ring

is %0mm original length3 & 2%mm = '%mm

'%mm

The force of gra9it8 #ulls it do7n

It has magnitude and direction


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1& | P a g e

"#ring 1. From the gra#h a force of 10* causes an extension of

12.%mm in s#ring 1 and an extension of 1%mm in s#ring 2.

5fter #oint + the gra#h is no longer straight

P

From the gra#h the extensions are 1mm and 2-mm. The differencein extension is 'mm


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11 | P a g e


12/13

12 | P a g e

1 2' ( 2 1

)rror on

:imit of #ro#ortionalit8 has een reached

Find the original length of the s#ring. Measure the ne7

length of the s#ring 7hen it has a load. "utract the

measured length from the original length.


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4.1. What is the extension of the spring? (1)

= 20mm $2mm = 12 mm

4.2. If the spring obeys Hookes Law, what oes it te!! yo" abo"t the

extension an the !oa? (2)

The extension is directl8 #ro#ortional to the load.

4.#. What wo"! the extension be if there was a $% !oa? (2)

F = k . x

Therefore ; = F/x..

k1 = k2 therefore

F1/x1=F2/x2

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Hookes Law w Sheet Answers