7A car increases its speed from 40kph to 55 kph within 5 seconds while a bicycle increases its speed to 15 kph from rest also within 5 seconds. Which is not true about their motion? A) The car has a greater acceleration than the bicycle. B) The car has a greater speed than the bicycle. C) The car has a greater final velocity than the bicycle. D) The car has traveled a greater distance than the bicycle. 8A piece of stone is thrown vertically upward. At its maximum height, the net force on it is A) less than its weight; B) more than its weight; C) equal to its weight; D) zero. 9Friction force between two surfaces in contact does not depend on A) the normal force; B) the area of surface in contact; C) the nature of the materials in contact; D) whether lubricant is used or not
7A car increases its speed from 40kph to 55 kph within 5 seconds while a bicycle increases its speed to 15 kph from rest also within 5 seconds. Which is not true about their motion? A) The car has a greater acceleration than the bicycle. B) The car has a greater speed than the bicycle. C) The car has a greater final velocity than the bicycle. D) The car has traveled a greater distance than the bicycle. 8A piece of stone is thrown vertically upward. At its maximum height, the net force on it is A) less than its weight; B) more than its weight; C) equal to its weight; D) zero. 9Friction force between two surfaces in contact does not depend on A) the normal force; B) the area of surface in contact; C) the nature of the materials in contact; D) whether lubricant is used or not
College Physics
10th Edition
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter2: Motion In One Dimension
Section: Chapter Questions
Problem 71AP: An ice sled powered by a rocket engine sum from rest on a large frozen lake and accelerates at + 40...
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Displacement, Velocity and Acceleration
In classical mechanics, kinematics deals with the motion of a particle. It deals only with the position, velocity, acceleration, and displacement of a particle. It has no concern about the source of motion.
Linear Displacement
The term "displacement" refers to when something shifts away from its original "location," and "linear" refers to a straight line. As a result, “Linear Displacement” can be described as the movement of an object in a straight line along a single axis, for example, from side to side or up and down. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Linear displacement is usually measured in millimeters or inches and may be positive or negative.
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7A car increases its speed from 40kph to 55 kph within 5 seconds while a bicycle increases its speed to 15 kph from rest also within 5 seconds. Which is not true about their motion?
A) The car has a greater acceleration than the bicycle.
B) The car has a greater speed than the bicycle.
C) The car has a greater final velocity than the bicycle.
D) The car has traveled a greater distance than the bicycle.
8A piece of stone is thrown vertically upward. At its maximum height, the net force on it is
A) less than its weight;
B) more than its weight;
C) equal to its weight;
D) zero.
9Friction force between two surfaces in contact does not depend on
A) the normal force;
B) the area of surface in contact;
C) the nature of the materials in contact;
D) whether lubricant is used or not
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