I. MULTIPLE CHOICE (Right answer 1.5 points). In the following statements (quest

Question

I. MULTIPLE CHOICE (Right answer 1.5 points). In the following statements (questions), select the correct option (answer). 1. The two measurements necessary for calculating average speed are? A) acceleration and time. B) velocity and time. C) distance and time. D) distance and acceleration. E) velocity and distance 2. A glance at the speedometer on your vehicle will tell you? A) average speed. B) instantaneous speed. C) overall speed. D) acceleration 3. Nellie runs the length of a 100-yard football field in a time of 20 seconds. Her average running speed is? A) 1/2 yard/second. B) 5 yards/second. C) 50 yards/second. D) not enough information 4. A mosquito flying at 3 m/'s encounters a 3-m/s breeze blowing in the opposite direction, which gives it a resulting speed over the ground of? A) 0 m/s. ) 3 m/s. C) 4 m/s. D) 6 m/s 5. While in an airplane flying at 100 km/h you look down from the window and spot another airplane flying at the same speed in the opposite direction. Relative to you, the speed of the spotted plane is? A) zero. B) 100 km/h. C) 150 km/h. D) 200 km/h 6. You're driving in a car at 50 km/h and bump into a car ahead traveling at 48 km/h in the same direction. The speed of impact is? A) zero. B) 2 km/h. C) 48 km/h. D) 50 km/h E) 98 km/h. 7. The average speed of Daisy running a distance of 2 km in a time of one-half hour is? A) 1 km/h. B) 2 km/h. c) 4 km/h

Explanation / Answer

1. Av speed= total distance travelled / total time taken

Option (c) is correct

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2. It indicates instantaneous speed

Option (b) is correct

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3. Av speed = 100/20= 5 m/s

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4. Speed= 3-3= 0 m/s

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5. Velocity of spotted plane= 100- (-100)= 200 km/h

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6. Relative velocity imoact= 50-48= 2 km/hr

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7. Distance= 2*0.5= 1 km/h

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Comment in case any doubt. .. Goodluck

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