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everything maths and science - C2B2A

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14. het gelyke groottes maar teenoorgestelde<br />

rigtings<br />

15. 15 N noord en 7 N wes<br />

16. 0 ◦<br />

2 Newton se wette<br />

Oefening 2 – 1:<br />

1. Kineties wrywingskrag = 0 N en<br />

statiese wrywingskrag = 20 N na<br />

links.<br />

2. a) 0 N vir kinetiese en statiese<br />

wrywingskragte.<br />

b) Kinetiese wrywingskrag: 0 N<br />

Oefening 2 – 2:<br />

1. Fgy=172,30 N in die negatiewe<br />

y-rigting, Fgx=422,20 N in die<br />

Oefening 2 – 3: Kragte en beweging.<br />

17. 4 N<br />

18. 902,98 N<br />

19. a) B<br />

b) 781 N<br />

en statiese wrywingskrag: 5 N<br />

c) 8 N<br />

d) 4 N<br />

e) Kinetiese wrywingskrag: 4 N<br />

en statiese wrywingskrag: 0 N<br />

negatiewe x-rigting.<br />

2. 42,61 ◦<br />

1. c) 55 N na regs 2. c) 346,41 N<br />

Oefening 2 – 5:<br />

2. 1700 N<br />

3. 12 N<br />

4. 0,1 m·s −2<br />

496 Oplossings<br />

5. 17,5 N<br />

6. 20 kg<br />

7. 0,15 m·s −2

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