Advertisements
Advertisements
Question
Distinguish between acceleration and retardation.
Advertisements
Solution
Acceleration is the increase in velocity per second, while retardation is the decrease in velocity per second. Thus, retardation is negative acceleration. In general, acceleration is taken positive, while retardation is taken negative.
APPEARS IN
RELATED QUESTIONS
Figure shows the velocity-time graphs for two cars A and B moving in the same direction. Which car has greater acceleration? Give reasons to your answer.
Explain the following concept in your own words with everyday examples:
Acceleration
An aeroplane lands at 216 kmh−1 and stops after covering a runway of 2 m. Calculate the acceleration and the time, in which it comes to rest.
State if the following situation is possible:
A body moving horizontally with an acceleration in vertical direction.
Is it possible for an accelerating body to have constant speed?
The rate of change of velocity is ______.
Assertion: The accelerated motion of an object may be due to change in magnitude of velocity or direction or both of them.
Reason: Acceleration can be produced only by change in magnitude of the velocity. It does not depend the direction.
What do you understand about negative acceleration?
The speed of a particle is constant. Will it have acceleration? Justify with an example.
Assertion: A negative acceleration of a body can be associated with speeding up of the body.
Reason: Increase in the speed of a moving body is independent of its direction of motion.
