College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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![25 A baseball player throws a ball horizontally.
Which statement best describes the ball's motion
after it is thrown? [Neglect friction.]
(1) Its vertical speed remains the same and its
horizontal speed increases.
(2) Its vertical speed remains the same and its
horizontal speed remains the same.
(3) Its vertical speed increases and its horizontal
speed increases.
(4) Its vertical speed increases and its horizontal
speed remains the same.
26 A red ball and a green ball are simultaneously
thrown horizontally from the same height. The
red ball has an initial speed of 40. meters per
second and the green ball has an initial speed of
20. meters per second. Compared to the time it
takes the red ball to reach the ground, the time it
takes the green ball to reach the ground is
(3) half as much
(4) four times as much
(1) the same
(2) twice as much
27 A student throws a stone upward
45° above the horizontal. Which statement best
describes the stone at the highest point that it
an angle of
reaches?
(1) Its acceleration is zero.
(2) Its acceleration is a minimum, but not zero.
(3) Its gravitational potential energy is a
minimum.
(4) Its kinetic energy is a minimum.
28 A projectile is launched with an initial velocity of
200 meters per second at an angle of 30° above the
horizontal. What is the magnitude of the vertical
component of the projectile's initial velocity?
200 m/s
(1) 200 m/s x cos 30° (3)
cos 30°
200 m/s
(4)
sin 30°
(2) 200 m/s x sin 30°
29 An amusement park ride moves a rider at a
constant speed of 14 meters per second in a
horizontal circular path of radius 10. meters.
What is the magnitude of the rider's centripetal
acceleration in terms of g, the acceleration due to
gravity?
8.
(1) 1g
(2) 2g
30 As a cart travels around a horizontal circular
(3) 3g
(4) 0g
track, the cart must undergo a change in
(1) velocity
(2) inertia
(3) speed
(4) weight](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc7b0bd07-f9a4-4722-8a58-c7c3191c2d59%2Ff725bf10-45c6-40a6-8c0c-91dde81d1b33%2Flrwrb7r_processed.jpeg&w=3840&q=75)
Transcribed Image Text:25 A baseball player throws a ball horizontally.
Which statement best describes the ball's motion
after it is thrown? [Neglect friction.]
(1) Its vertical speed remains the same and its
horizontal speed increases.
(2) Its vertical speed remains the same and its
horizontal speed remains the same.
(3) Its vertical speed increases and its horizontal
speed increases.
(4) Its vertical speed increases and its horizontal
speed remains the same.
26 A red ball and a green ball are simultaneously
thrown horizontally from the same height. The
red ball has an initial speed of 40. meters per
second and the green ball has an initial speed of
20. meters per second. Compared to the time it
takes the red ball to reach the ground, the time it
takes the green ball to reach the ground is
(3) half as much
(4) four times as much
(1) the same
(2) twice as much
27 A student throws a stone upward
45° above the horizontal. Which statement best
describes the stone at the highest point that it
an angle of
reaches?
(1) Its acceleration is zero.
(2) Its acceleration is a minimum, but not zero.
(3) Its gravitational potential energy is a
minimum.
(4) Its kinetic energy is a minimum.
28 A projectile is launched with an initial velocity of
200 meters per second at an angle of 30° above the
horizontal. What is the magnitude of the vertical
component of the projectile's initial velocity?
200 m/s
(1) 200 m/s x cos 30° (3)
cos 30°
200 m/s
(4)
sin 30°
(2) 200 m/s x sin 30°
29 An amusement park ride moves a rider at a
constant speed of 14 meters per second in a
horizontal circular path of radius 10. meters.
What is the magnitude of the rider's centripetal
acceleration in terms of g, the acceleration due to
gravity?
8.
(1) 1g
(2) 2g
30 As a cart travels around a horizontal circular
(3) 3g
(4) 0g
track, the cart must undergo a change in
(1) velocity
(2) inertia
(3) speed
(4) weight
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