NEXT TIME QUESTION SUPPOSE YOU AND A PAIR OF LIFE PRESERVERS ARE FLOATING DOWN A SWIFT RIVER, AS CONCEPTUAL Physics SHOWN. YOU WISH TO GET TO EITHER OF THE LIFE PRESERVERS FOR SAFETY. ONE IS 3 METERS DOWNSTREAM FROM YOU AND THE OTHER IS 3 METERS UPSTREAM FROM YOU. WHICH CAN YOU SWIM TO IN THE SHORTEST TIME? a) THE PRESERVER UPSTREAM. b) THE PRESERVER DOWNSTREAM. current C) BOTH REQUIRE THE SAME TIME. Ham to kin Clement and Corte Comp CH 3-1TRACKS A AND B ARE MADE FROM PIECES OF CHANNEL IRON OF THE SAME LENGTH. THEY ARE BENT IDENTICALLY EXCEPT FOR THE SMALL DIP NEAR THE MIDDLE OF TRACK B. WHEN THE BALLS ARE SIMULTANEOUSLY RELEASED ON BOTH TRACKS AS INDICATED. THE BALL THAT RACES TO THE END OF THE TRACK FIRST 15 ON a) TRACK A. b)TRACK B. c) BOTH REACH THE END AT THE SAME TIME. CH 3'2 NEXT TIME QUESTION A MOTORIST WISHES TO TRAVEL 40 KILOMETERS AT AN AVERAGE SPEED OF 40 km/h. DURING THE FIRST 20 KILOMETERS, AN AVERAGE SPEED OF 40 km/h IS MAINTAINED. DURING THE NEXT 10 KILOMETERS. HOWEVER, THE MOTORIST AVERAGES ONLY 20 km/h. TO DRIVE THE LAST 10 KILOMETERS AND AVERAGE 40 km/h. THE MOTORIST MUST DRIVE a) 60 km/h. b) 80 km/h. c) 90 km/h. d) FASTER THAN THE SPEED OF LIGHT. 40 Km/ 20 Km/h O 20 Km - 10 km 40 km CH 3-3NEXT-TIME QUESTION 10 km/h 10 km/h 30 km/h 20 km WHEN THE 10-km/h BIKES ARE 20 km APART, A BEE BEGINS FLYING FROM ONE WHEEL TO THE OTHER AT A STEADY SPEED OF 30 km/h. WHEN IT GETS TO THE WHEEL. IT ABRUPTLY TURNS AROUND AND FLIES BACK TO TOUCH THE FIRST WHEEL, THEN TURNS AND KEEPS REPEATING THE BACK-AND-FORTH TRIP UNTIL THE BIKES MEET. AND = SQUISH ! HOW MANY KILOMETERS DID THE BEE TRAVEL IN ITS TOTAL BACK-AND-FORTH TRIPS? CH 3-4NEXT-TIME QUESTION conceptual Physics. AN AIRPLANE MAKES A STRAIGHT BACK-AND-FORTH ROUND TRIP, ALWAYS AT THE SAME AIRSPEED. BETWEEN TWO CITIES. IF IT ENCOUNTERS A MILD STEADY TAILWIND GOING, AND THE SAME STEADY HEADWIND RETURNING. WILL THE ROUND TRIP TAKE MORE, LESS. OR THE SAME TIME AS WITH NO WIND? CH 3-5