EXAM REVIEW 2014

# EXAM REVIEW 2014 - EXAM REVIEW Multiple Choice Identify the...

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EXAM REVIEW Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. A race car completes exactly 10 laps around an oval track. Which of the following pairs of quantities concerning its motion would both have values of zero? a. displacement, average velocity b. average speed, average acceleration c. distance, average speed d. average speed, average velocity e. displacement, average speed ____ 2. In an emergency braking exercise, a student driver stops a car travelling at 83 km/h [W] in a time of 4.0 s. What is the car’s acceleration during this time? (The answer is expressed in units of m/s 2 .) ____ 3. An object is thrown vertically downward at 3.2 m/s. How long will the object take to hit the ground 12 m below? ____ 4. A bullet accelerates uniformly along a barrel, exiting the gun in 24 ms with a speed of 196 m/s. The acceleration of the bullet, expressed in units of metre per second squared, is ____ 5. A car accelerates at 2.7 m/s 2 for 5.4 s, reaching a speed of 18 m/s. During the period of acceleration, the car travels a distance of a. 1.8 10 2 m d. 58 m b. 1.4 10 2 m e. 18 m c. 9.0 10 1 m ____ 6. A car is travelling north when it enters a curve. It maintains a constant speed and leaves the curve travelling east. The direction of the car’s acceleration is ____ 7. The acceleration due to gravity on Earth

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____ 8. With no wind, a hot air balloon rises vertically at 4.0 m/s. With a wind blowing, the same balloon rises at an angle of 10.0 with the vertical. What is the wind speed? ____ 9. Which of the following is NOT considered to be one of the “fundamental forces”? a. gravity d. weak nuclear b. friction e. electromagnetic c. strong nuclear ____ 10. The free-body diagram of a car in a skid with its brakes locked up is best represented by ____ 11. A 24-kg traffic light is suspended from the midpoint of a cable suspended between two poles. The angle between the cable and the pole is 80 at both poles. The net force acting on the traffic light has a value of ____
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• Summer '14
• N/A
• Force, pts, Electric charge, OBJ

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