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Unformatted text preview: 1 Physics Honors Midterm Review Questions 1. A car travels 90 km/h. How long does it take for it to travel 400 km? a. 4.1 h b. 4.2 h c. 4.3 h d. 4.4 h 2. A polar bear starts at the North pole. It travels 1.0 km South, then 1.0 km East, then 1.0 km North to return to its starting point. This trip takes 30 min. What was the bear's average speed? a. 0 km/h b. 0.10 km/h c. 3.0 km/h d. 6.0 km/h 3. A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What is the average speed of the motorist for this trip? a. 84 km/h b. 89 km/h c. 90 km/h d. 91 km/h 4. An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h north for 750 miles. What is the average speed for the trip? a. 260 mi/h b. 270 mi/h c. 275 mi/h d. 280 mi/h 5. A new car manufacturer advertises that their car can go "from zero to sixty in 8 s". This is a description of a. average speed. b. instantaneous speed. c. average acceleration. d. instantaneous acceleration. 6. Can an object's velocity change direction when its acceleration is constant? a. No, this is not possible because it is always speeding up. b. No, this is not possible because it is always speeding up or always slowing down, but it can never turn around. c. Yes, this is possible, and a rock thrown straight up is an example. d. Yes, this is possible, and a car that starts from rest, speeds up, slows to a stop, and then backs up is an example. 7. A cart starts from rest and accelerates at 4.0 m/s 2 for 5.0 s, then maintain that velocity for 10 s, and then decelerates at the rate of 2.0 m/s 2 for 4.0 s. What is the final speed of the car? a. 20 m/s b. 16 m/s c. 12 m/s d. 10 m/s 2 8. The metric prefix for one thousand is a. milli b. centi c. kilo d. mega 9. Fifty milligrams is a. 0.000050 g b. 0.00050 g c. 0.050 g d. 50000 g 10. An average human has a heart rate of 70 beats per minute. If someone's heart beats at that average rate over a 70-yr lifetime, how many times would it beat? a. 7.4 x 10 5 b. 2.2 x 10 6 c. 1.8 x 10 7 d. 2.6 x 10 9 11. You are driving home on a weekend from school at 55 mi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. You arrive home after driving 4 hours and 15 minutes. How far is your hometown from school? a. 180 mi b. 190 mi c. 200 mi d. 210 mi 12. An object moving in the +x axis experiences an acceleration of 5.0 m/s 2 . This means the object is a. traveling at 2.0 m in every second. b. traveling at 5.0 m/s in every second. c. changing its velocity by 5.0 m/s. d. increasing its velocity by 5.0 m/s in every second. 13. A bullet moving horizontally with a speed of 500 m/s strikes a sandbag and penetrates a distance of 10.0 cm. What is the average acceleration, in m/s 2 , of the bullet?...
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- Spring '10