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WSKT 212 PAC

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1<br />

f =<br />

T<br />

1<br />

=<br />

0,4<br />

∴ f = 2,5 siklusse per sekonde, wat ook geskryf kan word as 2,5 Hz.<br />

6.<br />

7.<br />

ω= 2πf<br />

= 2×π× 2,5<br />

= 5πradiale/sekonde of 15,708 radiale/sekonde<br />

( ) ( ) ( ) ( )<br />

ht =−0,8⋅cos 5π t + 1 of ht =−0,8⋅ cos 15,708t + 1<br />

8.<br />

( ) ( )<br />

( )<br />

=− ⋅ ( ) +<br />

h 0,7 =−0,8 ⋅cos 5π× 0,7 + 1<br />

=−0,8⋅ cos 10,996 + 1<br />

0,8<br />

=1m<br />

0 1 SAKREKENAAR IN RADIALE!!!<br />

Stem die antwoord ooreen met wat u uit die grafiese voorstelling sou kon aflees?<br />

Ja! (Dankie tog)<br />

157

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