College Physics
1st Edition
ISBN: 9781938168000
Author: Paul Peter Urone, Roger Hinrichs
Publisher: OpenStax College
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Chapter 3, Problem 38PE
A football quarterback is moving straight backward at a speed of 2.00 m/s when he throws a pass to a player 18.0 m straight downfield. (a) If the ball is thrown at an angle of 25° relative to the ground and is caught at the same height as it is released, what is its initial speed relative to the ground? (b) How long does it take to get to the receiver? (c) What is its maximum height above its point of release?
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Small ice cubes, each of mass 5.60 g, slide down a frictionless track in a steady stream, as shown in the figure below. Starting from rest, each cube moves down through a net vertical distance of h = 1.50 m and leaves the bottom end of the track at an angle of 40.0° above the horizontal.
At the highest point of its subsequent trajectory, the cube strikes a vertical wall and rebounds with half the speed it had upon impact. If 10 cubes strike the wall per second, what average force is exerted upon the wall?
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to the top
to the bottom
to the left
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1.50 m
40.0°
The magnitude of the net force exerted in the x direction on a 3.00-kg particle varies in time as shown in the figure below.
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45
(a) Find the impulse of the force over the 5.00-s time interval.
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(b) Find the final velocity the particle attains if it is originally at rest.
m/s
(c) Find its final velocity if its original velocity is -3.50 î m/s.
V₁
m/s
(d) Find the average force exerted on the particle for the time interval between 0 and 5.00 s.
=
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Fig. 27-65, 8 = 1.2 kV, C = 6.5 µF,
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What is the potential difference V2 across resistor 2 at (g) t = 0 and
(h) t = ∞o? (i) Sketch V2 versus t between these two extreme times.
Figure 27-65 Problem 63.
Chapter 3 Solutions
College Physics
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