A car is traveling at 26.0 m/s when the driver suddenly applies the brakes, causing the car to slow down with constant acceleration. The car comes to a stop in a distance of 120 m
How fast was the car moving when it was 60.0 m past the point where the brakes were applied?
A) 15.0 m/s B) 12.1 m/s C) 18.4 m/s D) 22.5 m/s E) 9.20 m/s
C
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A force of 3.8N directed along the positive x-axis combines with a second force directed along the positive y-axis to produce a total force vector of magnitude 6.1N. What is the magnitude of the second vector?
A. 2.7N B. 9.5N C. 23.5N D. 4.8N E. Not enough information is given.
A ball is thrown horizontally from the top of a tower at the same instant that a stone is dropped vertically. Which object is traveling faster when it hits the level ground below if we neglect air?
A) It is impossible to tell because we do not know their masses. B) the stone C) the ball D) Both are traveling at the same speed.
A beam of light emerges from water into air at an angle bent
A) towards the normal B) away from the normal. C) in a direction parallel to the normal. D) in a direction perpendicular to the normal. E) not at all.
Initially, fewer neutrinos were detected than predicted by theoretical models because
A) neutrinos changed form to undetected types of neutrinos. B) the wrong liquid was being used in neutrino detectors. C) particle physicists did not understand the proton-proton chain. D) the proton-proton chain does not actually produce neutrinos. E) neutrinos take many years to pass out of the sun from its core.