Projectile Motion: For general projectile motion with no air resistance, the vertical component of a projectile's acceleration

A. is always zero.
B. remains a non-zero constant.
C. continuously increases.
D. continuously decreases.
E. first decreases and then increases.


Answer: B

Physics & Space Science

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Two people, each of 70 kg mass, are riding in an elevator. One is standing on the floor. The other is hanging on a rope suspended from the ceiling. Compare the force

image the floor exerts on the first person to the force image the rope exerts on the second person. Which statement is correct?
 
a.
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b.
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c.
image is greater than image but they have the same direction.
 
d.
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e.
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