29. When a person parachutes from a plane, she travels at about 67 meters per second. When she pulls her cord and her chute opens, she slows to about 3 meters per second. If the velocity and acceleration are both considered positive before the chute opens, how do her velocity and acceleration change when the chute opens? A Velocity and acceleration both remain positive. B. Velocity and acceleration both become negative. C. Velocity remains positive but acceleration becomes negative. D. Velocity becomes negative but acceleration remains positive.

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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When a person parachutes from a plane, she travels at about 67 meters per second. When she pulls her cord and her chute opens, she slows to about 3 meters per second. If the velocity and acceleration are both considered positive before the chute opens, how do her velocity and acceleration change when the chute opens?

c. 10.4m/s?
D. 31.2m/s?
Unit 1 1-D Kinematics
Page 11 of 24
schoolnet
29. When a person parachutes from a plane, she travels at about 67 meters per second. When she
pulls her cord and her chute opens, she slows to about 3 meters per second. If the velocity and
acceleration are both considered positive before the chute opens, how do her velocity and
acceleration change when the chute opens?
A
Velocity and acceleration both remain positive.
B. Velocity and acceleration both become negative.
C. Velocity remains positive but acceleration becomes negative.
D. Velocity becomes negative but acceleration remains positive.
30. Margaret is running a full lap around a circular track. She is facing north when she starts. What
direction will she be facing after she has completed half of a lap?
A
north
В.
south
C.
east
D.
west
31. The speed-versus-time graph shown below represents the motion of an object.
Speed Versus Time
6
Page 12 I 24
+
5
Transcribed Image Text:c. 10.4m/s? D. 31.2m/s? Unit 1 1-D Kinematics Page 11 of 24 schoolnet 29. When a person parachutes from a plane, she travels at about 67 meters per second. When she pulls her cord and her chute opens, she slows to about 3 meters per second. If the velocity and acceleration are both considered positive before the chute opens, how do her velocity and acceleration change when the chute opens? A Velocity and acceleration both remain positive. B. Velocity and acceleration both become negative. C. Velocity remains positive but acceleration becomes negative. D. Velocity becomes negative but acceleration remains positive. 30. Margaret is running a full lap around a circular track. She is facing north when she starts. What direction will she be facing after she has completed half of a lap? A north В. south C. east D. west 31. The speed-versus-time graph shown below represents the motion of an object. Speed Versus Time 6 Page 12 I 24 + 5
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