Ball A is dropped from rest as ball B is shot out horizontally. Ball A hits the ground
1) before ball B.
2) after ball B.
3) at the same time as ball B.
This is because
4) ball A has less distance to travel.
5) ball B is acted upon by an additional force.
6) both balls fall the same vertical distance with the same acceleration.
Answer: 3, 6
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Exhibit 5-1
A 2.30-kg mass is suspended from the ceiling and a 1.70-kg mass is suspended from the 2.30-kg mass, as shown. The tensions in the strings are labeled and
.
?
?
Use this exhibit to answer the following question(s).
Refer to . A hand exerts an upward force of 6.70 N on the 1.70-kg mass. The magnitudes of the tensions are
A.
B.
C.
D.
E.
The magnetic force between parallel wires is used by the National Bureau of Standards to define the
A) Newton. B) Tesla. C) square-meter. D) Ampere. E) Coulomb.
Which of the following statements best describes the size of the largest asteroid, Ceres?
A) It is about the size of a terrestrial planet. B) It is smaller than the jovian planets but larger than the terrestrial planets. C) It is a little less than half the diameter of our Moon. D) It is no larger than a typical mountain on one of the terrestrial planets.
When an electron in an atom moves from a lower energy level to a higher one, a ______________ is ______________
a. photon; emitted b. proton; emitted c. photon; absorbed d. proton; absorbed