With no air resistance a projectile fired horizontally maintains its horizontal component of velocity because
A) no forces act on it.
B) no horizontal forces act on it.
C) of no initial vertical component of velocity.
D) all of the above
E) none of the above
Answer: B
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Which scenario is portrayed by the graph?
A. A car starts from rest and accelerates. It then travels at a constant velocity before slowing to a stop.
B. A car starts from rest and moves forward. It stops for a while before returning to its starting position.
C. A car travels at a constant velocity, then accelerates for a while, then returns to its initial constant velocity.
Exhibit 16-1
A graph of position versus time for an object oscillating at the free end of a horizontal spring is shown below.
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Use this exhibit to answer the following question(s).
Refer to Exhibit 16-1. The point at which the object has negative velocity and zero acceleration is
A. A B. B C. C D. D E. E
Few of the Moon's craters are actually due to volcanism, as was widely thought prior to Apollo
Indicate whether the statement is true or false
In which spectral sequence are the hottest stars categorized?
a. O stars b. B stars c. A stars d. F stars e. K stars