Physics
7th Edition
ISBN: 9780321733627
Author: Douglas C. Giancoli
Publisher: PEARSON
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Chapter 2, Problem 63GP
To determine
The minimum height of pelican above the water surface so that fish can escape in 0.20 s.
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A spacecraft in the shape of a long cylinder has a length of 100 m, and its mass with occupants is 1 860 kg. It has strayed too close to a black hole having a mass 98 times that of the Sun. The nose of the spacecraft points toward the black hole, and the distance between the nose and the
center of the black hole is 10.0 km.
H
100 m-
Black hole
//10.0 km/
i
(a) Determine the total force on the spacecraft.
N
(b) What is the difference in the gravitational fields acting on the occupants in the nose of the ship and on those in the rear of the ship, farthest from the black hole? (This difference in acceleration grows rapidly as the ship approaches the black hole. It puts the body of the ship
under extreme tension and eventually tears it apart.)
N/kg
Three uniform spheres of masses m₁ = 3.00 kg, m₂ = 4.00 kg, and m3 = 6.50 kg are placed at the corners of a right triangle (see figure below). Calculate the resultant gravitational force on the object of mass m2, assuming the spheres are isolated from the rest of the Universe.
Ĵ) × 10-11 N
Î +
(0, 3.00) m
1)x
m₁
(-4.00, 0) m
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m3
32
0
x
m2
A spring with unstretched length of 14.3 cm has a spring constant of 4.63 N/m. The spring is lying on a horizontal surface, and is attached at one end to a vertical post. The spring can move freely around the post. The other end of the spring is attached to a puck of mass m. The puck is set
into motion in a circle around the post with a period of 1.32 s. Assume the surface is frictionless, and the spring can be described by Hooke's law.
(a) What is the extension of the spring as a function of m? (Assume x is in meters and m is in kilograms. Do not include units in your answer.)
x =
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(b) m =
0.0700 kg
m
(c) m = 0.140 kg
(d) m 0.180 kg
m
m
(e) m =
0.210 kg
m
Chapter 2 Solutions
Physics
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