Choose the answer
1. Where will the flare land (neglect air resistance) if a speed boat is equipped with a flare launcher that is capable of launching a sphere vertically (relative to the snowmobile is in motion and launches the flare that maintains a constant horizontal velocity after the launched?
a. in front of the speed boat
b. behind the speed boat
c. in the speed boat
d. in the initial of launched
2. What do you expect about the horizontal velocity of a projectile?(neglecting air resistance)
a. the horizontal velocity is zero.
b. the horizontal velocity varies with time
c. the horizontal velocity is constant
d. the horizontal velocity varies with mass.
3. What is the horizontal acceleration of a projectile?
a. 0m/s²
b. 9.8m/s²
c. -9.8m/s²
d. 0 m/s
4. What is the vertical velocity of a projectile at the peak of travel?
a. 0m/s²
b. 9.8m/s²
c. -9.8m/s²
d. 0 m/s²
5. What is the horizontal location of the plane, neglecting air resistance when the pilot drops a package and hits the ground?
a. be behind of the package
b. be in front of the package
c. depend on the mass of the package
d. be directly over of the package
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Answers & Comments
Answer:
2. C
3. A
4. D