Essential University Physics: Volume 1 (3rd Edition)
3rd Edition
ISBN: 9780321993724
Author: Richard Wolfson
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 75P
A jet is diving vertically downward at 1200 km/h. If the pilot can withstand a maximum acceleration of 5g (i.e., 5 times Earth’s gravitational acceleration) before losing consciousness, at what height must the plane start a 90° circular turn, from vertical to horizontal, in order to pull out of the dive? See Fig. 3.25, assume the speed remains constant, and neglect gravity.
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How far above the surface of Earth do you have to go before the acceleration due to gravity drops by 0.10% , 1.0% and 10% ?
A helicopter rises with a uniform speed of 30 m/s at an angle of 50° to the horizontal. (a) What are the vertical and horizontal components of its velocity? (b) How long will it take to reach an altitude of 1.00 km? (c) What horizontal distance will it have covered by that time?
A rock is thrown off a cliff at an angle of 59° above the horizontal. The cliff is 135 m high. The initial speed of the rock is 20 m/s. (Assume the height of the thrower is negligible.)
(a) How high above the edge of the cliff does the rock rise (in m)?wrong answers are 149.449m and 18.016m
(b) How far has it moved horizontally when it is at maximum altitude (in m)? (c) How long after the release does it hit the ground (in s)?
(d) What is the range of the rock (in m)?
(e)What are the horizontal and vertical positions (in m) of the rock relative to the edge of the cliff at t = 2.0 s, t = 4.0 s, and t = 6.0 s?(Assume the +x-direction is in the horizontal direction pointing away from the cliff, the +y-direction is up towards the sky, and x = y = 0 at the point from which the rock is thrown.)
x(2.0 s) = my(2.0 s) = mx(4.0 s) = my(4.0 s) = mx(6.0 s) = my(6.0 s) = m
Chapter 3 Solutions
Essential University Physics: Volume 1 (3rd Edition)
Ch. 3.1 - Which vector describes a displacement of 10 units...Ch. 3.2 - An object is accelerating downward. Which, if any,...Ch. 3.3 - An airplane is making a 500-km trip directly north...Ch. 3.4 - An object is moving initially in the +x-direction....Ch. 3.5 - Two projectiles are launched simultaneously from...Ch. 3.6 - An object moves in a horizontal plane with...Ch. 3 - Under what conditions is the magnitude of the...Ch. 3 - Can two vectors of equal magnitude sum to zero?...Ch. 3 - Repeat Question 2 for three vectors. 2. Can two...Ch. 3 - Can an object have a southward acceleration while...
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