Advertisements
Advertisements
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 .
Advertisements
उत्तर
(a) The magnitude of acceleration is lower as the slope of line AB is less than that of line CD.
(b) Slope of line AB = vo/t
Slope of line CD = vo/0.5t
Slope of line AB/Slope of line CD = (vo /t)/(vo /0.5t)
Slope of line AB:Slope of line CD :: 1:2.
APPEARS IN
संबंधित प्रश्न
Give a scientific reason.
When an object falls freely to the ground, its acceleration is uniform.
A vehicle is accelerating on a straight road. Its velocity at any instant is 30 km/h. After 2 s, it is 33.6 km/h, and after further 2 s, it is 37.2 km/h. Find the acceleration of the vehicle in m s-2. Is the acceleration uniform?
From the velocity – time graph given below, calculate deceleration in region BC.
Define acceleration.
Out of energy and acceleration, which one is a vector?
A car is moving with a speed of 50 km/h. One second later, its speed is 55 km/h. What is its acceleration?
What do you mean by constant acceleration?
Negative acceleration is called ______.
The speed of a particle is constant. Will it have acceleration? Justify with an example.
The value of acceleration for a body at rest is ______.
