8. Joe decides to race his younger sister, Debbie, and gives her a 25 m head...

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8. Joe decides to race his younger sister, Debbie, and gives her a 25 m head start. At the instant Joe starts running, his sister reaches a velocity of 14 m/s [W] while accelerating at 0.5 m/s [W]. If Joe accelerates at a rate of 1.2 m/s [W], how long does it take for him to catch up to his sister? [THINK -7 marks] 9. Consider the circuit below: 6v+ 100 400 ww -> 100 ww 200 a) Calculate the total resistance of the circuit. [APP - 5 marks] b) Calculate the current in the circuit. [APP - 1 mark] www 10. Draw the direction of electron flow, label the poles of the electromagnet, and determine the direction N 8. Joe decides to race his younger sister, Debbie, and gives her a 25 m head start. At the instant Joe starts running, his sister reaches a velocity of 14 m/s [W] while accelerating at 0.5 m/s [W]. If Joe accelerates at a rate of 1.2 m/s [W], how long does it take for him to catch up to his sister? [THINK -7 marks] 9. Consider the circuit below: 6v+ 100 400 ww -> 100 ww 200 a) Calculate the total resistance of the circuit. [APP - 5 marks] b) Calculate the current in the circuit. [APP - 1 mark] www 10. Draw the direction of electron flow, label the poles of the electromagnet, and determine the direction N