The diagram below shows the position of a long straight wire perpendicular to the page and a set of directions labeled A through H. When the current in the wire is directed up out of the page, the direction of the magnetic field at point P is
A. D.
B. E.
C. F.
D. G.
E. H.
Answer: B
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Alec and Michelle release their snowballs from the same height, at the same time and with the same speed. Alec's is thrown upward while Michelle’s is thrown downward. Which one hits the ground with the greatest speed (ignore air resistance)?
A. the one thrown upward B. the one thrown downward C. they hit with the same speed D. it depends on the initial height
A 1.0-kg block is pushed up a rough 22° inclined plane by a force of 7.0 N acting parallel to the incline. The acceleration of the block is 1.4 m/s2 up the incline. Determine the magnitude of the force of friction acting on the block.
A. 1.9 N B. 2.2 N C. 1.3 N D. 1.6 N E. 3.3 N
A "force" could be best described as
A) something that a body possesses, that enables it to keep moving. B) a mystical aura that emanates after midnight from physics laboratories. C) something one body does to another body that keeps the second body moving. D) something one body does to another body that can cause the second body to accelerate. E) something that a body possesses, that enables it to do work.
A long thin uniform rod of length 1.50 m is to be suspended from a pivot so that its pendulum motion takes 3.00 s. How far from the center of the rod should the pivot be placed?
A) 7.98 cm B) 7.52 cm C) 8.72 cm D) 8.40 cm E) 23.4 cm