Can a particle be accelerated
$(i)$ if its speed is constant?
$(ii)$ if its velocity is constant?
$(i)$ if its speed is constant?
$(ii)$ if its velocity is constant?
(A) $(i)$ Yes. $A$ particle moving with constant speed can be accelerated if its direction of motion changes,such as in uniform circular motion.
$(ii)$ No. Acceleration is defined as the rate of change of velocity. If velocity is constant,the rate of change of velocity is zero,meaning acceleration is zero.
$(ii)$ No. Acceleration is defined as the rate of change of velocity. If velocity is constant,the rate of change of velocity is zero,meaning acceleration is zero.
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Similar Questions
$(a)$ What is acceleration? Write its $SI$ unit.
$(b)$ Draw velocity-time graphs for an object having:
$(i)$ Uniformly accelerated velocity.
$(ii)$ Uniformly retarded velocity.
$(b)$ Draw velocity-time graphs for an object having:
$(i)$ Uniformly accelerated velocity.
$(ii)$ Uniformly retarded velocity.
Medium
View SolutionWhat is a velocity-time graph? State how it can be used to find:
$(i)$ The acceleration of a body.
$(ii)$ The displacement of the body.
$(iii)$ The distance travelled in a given time.
$(i)$ The acceleration of a body.
$(ii)$ The displacement of the body.
$(iii)$ The distance travelled in a given time.
Difficult
View Solution$A$ scooter starts from rest and moves in a straight line with a constant acceleration,covering a distance of $64 \, m$ in $4 \, s$.
$(i)$ Calculate its acceleration and its final velocity.
$(ii)$ At what time had the scooter covered half the total distance?
$(i)$ Calculate its acceleration and its final velocity.
$(ii)$ At what time had the scooter covered half the total distance?
Medium
View SolutionFrom the given $v-t$ graph (Fig.),it can be inferred that the object is
Easy
View SolutionThe numerical ratio of displacement to distance for a moving object is
Easy
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