Physics, asked by pragya105mb, 9 months ago

Define Acceleration. With the help of formula of acceleration state the condition for- 1) Positive acceleration 2) Negative acceleration 3) Zero acceleration

Answers

Answered by ItsSmartyPayal

Explanation:

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$<body bgcolor=black> The final mathematical quantity discussed in Lesson 1 is acceleration. An often confused quantity, acceleration has a meaning much different than the meaning associated with it by sports announcers and other individuals. The definition of acceleration is:Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity.$

$ Sports announcers will occasionally say that a person is accelerating if he/she is moving fast. Yet acceleration has nothing to do with going fast. A person can be moving very fast and still not be accelerating. Acceleration has to do with changing how fast an object is moving. If an object is not changing its velocity, then the object is not accelerating. The data at the right are representative of a northward-moving accelerating object. The velocity is changing over the course of time. In fact, the velocity is changing by a constant amount - 10 m/s - in each second of time. Anytime an object's velocity is changing, the object is said to be accelerating; it has an acceleration.$

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Answered by Anonymous

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Acceleration is the rate of change of velocity

formula of acceleration = v-u/t

conditions for :

a)positive acceleration

When an object is speeding up, the acceleration is in the same direction as the velocity. Thus, this object has a positive acceleration

b)negative acceleration

According to our principle, when an object is slowing down, the acceleration is in the opposite direction as the velocity. Thus, this object has a negative accelerations

c)zero acceleration

When magnitude and direction of the velocity do not change, the acceleration of moving body is zero

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