Advertisements
Advertisements
प्रश्न
Which of the following figures (Fig. 8.3) represents uniform motion of a moving object correctly?
पर्याय
Advertisements
उत्तर
In uniform motion, object covers equal distances in equal intervals of time. Therefore, the distance-time graph must be a straight line inclined to the time axis. Hence, graph (a) is correct.
APPEARS IN
संबंधित प्रश्न
Under which condition is the magnitude of average velocity equal to average speed ?
Write the formula for acceleration. Give the meaning of each symbol which occurs in it.
A ball hits a wall horizontally at 6.0 m s-1. It rebounds horizontally at 4.4 m s-1. The ball is in contact with the wall for 0.040 s. What is the acceleration of the ball ?
The graph given alongside shows how the speed of a car changes with time:
(i) What is the initial speed of the car ?
(ii) What is the maximum speed attained by the car ?
(iii) Which part of the graph shows zero acceleration ?
(iv) Which part of the graph shows varying retardation ?
(v) Find the distance travelled in first 8 hours.
Figure shows the displacement of a body at different times .
Calculate the average velocity during the time interval 5 s to 9 s ,
[Hint : From 5 s to 9 s , displacement = 7 m - 3m = 4m]
The velocity-time graph of a moving body is given below in Figure
Displacement in each part AB, BC and CD.
A train is moving with a velocity of 90 km h-1 . It is brought to stop by applying the brakes which produce a retardation of 0.5 ms-2 Find :
(i) The velocity after 10 s , and
(ii) the time taken by the train to come to rest .
How many variables are present in each equation of motion?
What are the uses of equations of motion?
A motorcyclist drives from A to B with a uniform speed of 30 km h–1 and returns back with a speed of 20 km h–1. Find its average speed.
