Quiz Answer Key and Fun Facts
1. If an object is in free fall, what is the only force that is acting upon that object?
2. If an object is at rest on a flat surface, there is always gravity pulling down and the normal force pushing up. Which force is greater?
3. What unit is used to measure forces?
4. Which of these is NOT usually considered tension when a force is applied to its ends?
5. The coefficient of friction is a number that measures friction. It is not constant; it depends on what the two surfaces are. Usually the number will be between 0.1 and 1, although values outside this range can exist. Which Greek letter is used for this value?
6. If an object is on a sloped surface of 45 degrees, in which direction is the normal force?
7. Which of these would NOT be considered an applied force?
8. If a 30 kg bicycle, a 400 kg car, and a 5000 kg train are all traveling at 10 m/s at a specific time, and they don't accelerate or brake, which one will have the greatest frictional force acting upon it? Assume that the coefficient of friction is the same for all three vehicles.
9. Force is equal to mass times which of these?
10. Theoretically, if there were no forces acting on an object, and the object was moving in a particular direction at 5 m/s, what would eventually happen?
Source: Author hotdogPi
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