Tag Archives: Physics

Taking A Swim

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A block of wood is held half immersed in the water. When released, it submerged to a greater degree but remained afloat. When the block was initially released, which of the following must have been true?

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Odd Man Out

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All of the following quantities are vectors EXCEPT one. Which one is the EXCEPTION?

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The Sum of All Forces

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If the sum of all the forces acting on a moving object is zero, the object will:

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Electron’s Trajectory

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An electron moving at constant velocity enters the area between two charged plates, as shown below. Which of the paths is most consistent with the electron’s trajectory after leaving the area between the charged plates?

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Fly Like An Eagle

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The cruising altitude of most planes is about 10,000 meters above sea level where there is less air above the plane pushing down, so the air pressure is lower (about 20 kPa outside compared to about 100 kPa atmospheric pressure at sea level). To keep everyone comfortable inside the plane, the cabin is pressurized to about 75 kPa. The passenger doors on a 747 are about 1 meter wide by 2 meters tall.

If a metric ton is 1000 kg, to pull the door open at 10,000 meters is equivalent to moving how many metric tons? (the acceleration due to gravity can be approximated as 10 m/s2)

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Scale In An Elevator

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A person stands on a scale in an elevator (true, it does not happen everyday but it is the sort of insanity that happens on the MCAT!). She notices that the scale is reading lower than her normal weight. Which of the following most reasonably describes the motion of the elevator?

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Increased Incline

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A box is stationary on an inclined plane. As the angle of the inclined plane – determined by measuring from the horizontal – increases, the normal force:

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Pull On The Rope

What force will the boy need to pull on the rope to lift the weight?

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Newton’s Laws

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Which of Newton’s Laws of Motion is best described as “For every action there is an equal and opposite reaction.”?

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Planet and Moon

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A planet with a moon of 1/4 its mass are 10,000 km apart. At what distance from the planet will the gravitational pull of the planet and moon be equal?

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