College Physics
OER 2016 Edition
ISBN: 9781947172173
Author: OpenStax
Publisher: OpenStax College
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Chapter 3, Problem 28PE
(a) A daredevil is attempting to jump his motorcycle over a line of buses parked end to end by driving up a 32° ramp at a speed of 40.0 m/s (144 km/h). How many buses can he clear if the top of the takeoff ramp is at the same height as the bus tops and the buses are 20.0 m long? (b) Discuss what your answer implies about the margin of error in this act—that is, consider how much greater the range is than the horizontal distance he must travel to miss the end of the last bus. (Neglect air resistance.)
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A Jamin interferometer is a device for measuring or for comparing the indices of refraction of gases. A beam
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1. An arrangement of three charges is shown below where q₁ = 1.6 × 10-19 C, q2 = -1.6×10-19 C,
and q3 3.2 x 10-19 C.
2 cm
Y
93
92
91
X
3 cm
(a) Calculate the magnitude and direction of the net force on q₁.
(b) Sketch the direction of the forces on qi
(Figure 1)In each case let w be the weight of the suspended crate full of priceless art objects. The strut is uniform and also has weight w
Find the direction of the force exerted on the strut by the pivot in the arrangement (a).
Express your answer in degrees.
Find the tension Tb in the cable in the arrangement (b).
Express your answer in terms of w.
Find the magnitude of the force exerted on the strut by the pivot in the arrangement (b).
Express your answer in terms of w.
Chapter 3 Solutions
College Physics
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