{"id":228055,"date":"2025-06-06T19:12:03","date_gmt":"2025-06-06T19:12:03","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=228055"},"modified":"2025-06-06T19:12:05","modified_gmt":"2025-06-06T19:12:05","slug":"true-or-false-7","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/06\/true-or-false-7\/","title":{"rendered":"True or False"},"content":{"rendered":"\n
True or False? (a) A car must always have an acceleration in the same direction as its velocity. (b) It\u2019s possible for a slowing car to have a positive acceleration. (c) An object with constant nonzero acceleration can never stop and remain at rest.<\/pre>\n\n\n\n
The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n
Answers:<\/strong><\/p>\n\n\n\n
(a) False<\/strong>
(b) True<\/strong>
(c) False<\/strong><\/p>\n\n\n\n
\n\n\n\n
Explanation<\/h3>\n\n\n\n
Understanding the relationship between velocity<\/strong> and acceleration<\/strong> is crucial in physics, especially in kinematics. Here’s a detailed explanation of each statement:<\/p>\n\n\n\n
(a) False:<\/strong>
A car does not<\/strong> need to have acceleration in the same direction as its velocity. Acceleration is the rate of change of velocity<\/strong>, not the same thing as velocity. If a car is slowing down<\/strong>, its acceleration is in the opposite<\/strong> direction to its velocity. This is known as negative acceleration<\/strong> or deceleration<\/strong>. For example, a car moving forward (positive velocity) but braking (acceleration pointing backward) is experiencing acceleration opposite to its direction of motion.<\/p>\n\n\n\n
(b) True:<\/strong>
It is indeed possible for a slowing car to have a positive acceleration<\/strong>\u2014this depends on the coordinate system<\/strong> or direction defined as positive<\/strong>. Suppose the car is moving in the negative direction<\/strong> (e.g., backward), and it slows down. Then the acceleration must be positive<\/strong> (opposite the motion) to reduce its negative velocity. Hence, even though the car is slowing, the acceleration could still be considered positive relative to the chosen coordinate system.<\/p>\n\n\n\n
(c) False:<\/strong>
An object with constant nonzero acceleration<\/strong> can momentarily stop<\/strong>. A classic example is an object thrown vertically upward. As it rises, gravity (a constant downward acceleration) slows it down until its velocity becomes zero at the peak<\/strong>. At that instant, although the object is at rest (velocity = 0), it is still under the influence of a constant acceleration (gravity), so it resumes motion downward immediately after. Therefore, stopping momentarily is consistent with constant nonzero acceleration.<\/p>\n\n\n\n
In summary, acceleration can differ in direction from velocity, can be positive even while slowing down, and does not prevent an object from stopping momentarily before changing direction.<\/p>\n\n\n\n
\"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"
True or False? (a) A car must always have an acceleration in the same direction as its velocity. (b) It\u2019s possible for a slowing car to have a positive acceleration. (c) An object with constant nonzero acceleration can never stop and remain at rest. The Correct Answer and Explanation is: Answers: (a) False(b) True(c) False […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-228055","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/228055","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=228055"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/228055\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=228055"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=228055"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=228055"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}