PHYS 210 Final, Spring 2008
American University of Beirut · Introductory Physics II · 1 page
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Show the text of this final exam
A block of mass m is moving along a horizontal frictionless surface with a speed of 5.70 m/s. If the slope is 11°
and the coefficient of kinetic friction is between the block and the incline is m,=0.26. How large is the distance
traveled by the block along the incline?. You are advised to apply energy conservation.
Marks: 4
Vo =5.7 m/s
Choose one answer. a.372m ¥
b.6.49m x
c.3.24m x
© d.7.44m x
e.186m x
Incorrect
Marks for this submission: 0/4.
10
Mere Light of wavelength 519 nm (nm=nanometer=1 0-9 m) passes through two slits. In the interference pattern
observed on the screen, which is located 8.1 m away, adjacent fringes are separated by 3.9mm.
What is the separation of the two slits?. Small angle approximation is valid.
( Your answer should be in mm without inserting units and 2 digits after the point)
Answer: 1.08
Correct
Marks for this submission: 4/4.