What do you understand by the term acceleration? When is it positive and when is it negative?
(N/A) $(i)$ The rate of change of velocity with respect to time is called acceleration.
$(ii)$ Acceleration is considered positive if the velocity of an object increases in the direction of motion.
$(iii)$ Acceleration is considered negative (also known as retardation or deceleration) if the velocity of an object decreases,meaning the acceleration is in the direction opposite to the direction of motion.
$(ii)$ Acceleration is considered positive if the velocity of an object increases in the direction of motion.
$(iii)$ Acceleration is considered negative (also known as retardation or deceleration) if the velocity of an object decreases,meaning the acceleration is in the direction opposite to the direction of motion.
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Similar Questions
Study the speed-time graph of a car given below and answer the questions that follow:
$(i)$ What type of motion is represented by $OA$?
(ii) What type of motion is represented by $AB$?
(iii) What type of motion is represented by $BC$?
(iv) What is the acceleration of the car from $O$ to $A$?
$(v)$ What is the acceleration of the car from $A$ to $B$?
(vi) What is the retardation of the car from $B$ to $C$?
$(i)$ What type of motion is represented by $OA$?
(ii) What type of motion is represented by $AB$?
(iii) What type of motion is represented by $BC$?
(iv) What is the acceleration of the car from $O$ to $A$?
$(v)$ What is the acceleration of the car from $A$ to $B$?
(vi) What is the retardation of the car from $B$ to $C$?
Medium
View Solution$A$ particle accelerates from rest at a constant rate for some time and attains a constant velocity of $8\, m s^{-1}$. Afterwards,it decelerates at a constant rate and comes to rest. If the total time taken is $4\, s$,the distance travelled is:
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View SolutionDistinguish between the terms distance and displacement.
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View SolutionDraw a diagram to show the motion of a body whose speed remains constant but velocity continuously changes.
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View Solution$A$ body can have zero average velocity but not zero average speed. Justify this statement by giving an example.
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