Advertisements
Advertisements
प्रश्न
What do you mean by constant acceleration?
Advertisements
उत्तर
A body is said to have constant acceleration, if it travels is a straight line and its velocity increases or decreases by equal magnitude in equal intervals of time.
Ex: the motion of a freely falling body.
APPEARS IN
संबंधित प्रश्न
Figure given below shows a velocity-time graph for a car starting from rest. The graph has three parts AB, BC and CD.

(a) Is the magnitude of acceleration higher or lower than that of retardation ? Give a reason .
(b) Compare the magnitude of acceleration and retardation .
Explain the following concept in your own words with everyday examples:
Acceleration
When is the acceleration due to gravity negative?
Give an example of an accelerated body, moving with a uniform speed.
Draw velocity – time graph for the following situation:
When a body is moving with variable velocity and variable acceleration.
A cyclist driving at 5 ms−1, picks a velocity of 10 ms−1, over a distance of 50 m. Calculate
- acceleration
- time in which the cyclist picks up above velocity.
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.
A motor bike running at 90 kmh−1 is slowed down to 18 kmh−1 in 2.5 s. Calculate
- acceleration
- distance covered during slow down.
Define acceleration.
The acceleration of a moving body is constant in magnitude and direction. Must the path of the body be a straight line?
If not, given an example.
Write the SI unit of acceleration and retardation.
The speed of a car increases from 10 km/h to 64 km/h in 10 seconds. What will be its acceleration?
State if the following situation is possible:
A body moving with constant acceleration but with Zero velocity.
Figure represents graphically the velocity of a car moving along a straight road over a period of 100 hours.
Calculate the acceleration along AB and the retardation along BC.
The speed of a particle is constant. Will it have acceleration? Justify with an example.
What is meant by negative acceleration?
Acceleration is defined as the rate of change of ______.
If a body starts from rest, what can be said about the acceleration of the body?
What is the difference between uniform acceleration and non–uniform acceleration?
