In a game of pool, the white cue ball hits the #9 ball and is deflected at a 35° angle to the original line of motion. What is the angle of deflection below the original line of motion for the #9 ball?
A)
15°
B)
35°
C)
55°
D)
75°
E)
90°
C
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When a car is weighed, it is driven slowly on a horizontal floor over a scale that records a reading as the front wheels go over the scale, and then records a second reading as the rear wheels go over the scale. The weight of the car is equal to
A) the sum of the two weights. B) the weight under the rear wheels. C) the weight under the front wheels. D) the difference of the two weights. E) the average of the two weights.
M-87, the giant elliptical at the heart of the Virgo Supercluster, shows a(n) ________ extending outward from its core, moving at relativistic velocities
Fill in the blank(s) with correct word
A girl throws a rock horizontally, with a velocity of 10 m/s, from a bridge. It falls 20 m to the water below. How far does the rock travel horizontally before striking the water? (use g = 10 m/s2)
A) 14 m B) 24 m C) 20 m D) 16 m E) 12 m
For a plane to be able to fly clockwise in a horizontal circle as seen from above, in addition to exerting a force downwards on the air
a. it must be increasing its speed. b. it must exert a force on the air that is directed to the plane's left side. c. it must exert a force on the air that is directed to the plane's right side. d. it does not need to exert a force: it must only move the wing flaps out. e. it only needs to deflect the air without exerting any additional force on the air.