Advertisements
Advertisements
Question
A car accelerates to a velocity of 30 m/s in 10 s and then decelerates for 20 s so that it stops. Draw a velocity-time graph to represent the motion and find:
Distance travelled
Advertisements
Solution
Distance travelled= area under speed time graph = `1/2`x30x30 =450 m.
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.
Figure given below shows a velocity-time graph for a car starting from rest. The graph has three parts AB, BC and CD.
Which part of graph shows motion with uniform
(a) velocity (b) acceleration (c) retardation ?
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?
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.
The acceleration of a body is 8.5 ms-2. What does this statement mean?
The graph shows how the velocity of a scooter varies with time in 50 s.
Work out: Acceleration.
The rate of change of velocity is ______.
Negative acceleration is called ______.
It is possible to have objects moving with uniform speed but variable acceleration.
Assertion: A positive acceleration of a body can be associated with the slowing down of the body.
Reason: Acceleration is a vector.
