Advertisements
Advertisements
प्रश्न
Two friends leave Delhi for Chandigarh in their cars. A starts at 5 am and moves with a constant speed of 30 km/h, whereas B starts at 6 am and moves with a constant speed of 40 kmh-1. Plot the distance-time graph for their motion and find at what time the two friends will meet and at what distance from Delhi.
Advertisements
उत्तर

So we can see that the two friends wiil meet at 9 a.m ant till then they cover a distance of u x t = u' xt' = 30 x4 = 40 x 3 =120 km So they are 120 km away from Delhi when they meet at 9 a.m.
APPEARS IN
संबंधित प्रश्न
What is the nature of the distance-time graphs for uniform and non-uniform motion of an object?
What can you say about the motion of an object if its speed-time graph is a straight line parallel to the time axis?
Show the shape of the distance-time graph for the motion in the following case:
A car moving with a constant speed.
What does the slope of a distance-time graph indicate ?
What conclusion can you draw about the speed of a body from the following distance-time graph ?

A cyclist is travelling at 15 m s-1. She applies brakes so that she does not collide with a wall 18 m away. What deceleration must she have ?
If we denote speed by S, distance by D and time by T, the relationship between these quantities is ______.
Starting from A, Paheli moves along a rectangular path ABCD as shown in figure. She takes 2 minutes to travel each side. Plot a distance-time graph and explain whether the motion is uniform or non-uniform.

Boojho goes to the football ground to play football. The distance-time graph of his journey from his home to the ground is given in the figure.

- What does the graph between points B and C indicate about the motion of Boojho?
- Is the motion between 0 to 4 minutes uniform or non-uniform?
- What is his speed between 8 and 12 minutes of his journey?
Assertion: The slope of the distance-time graph of a body moving with high speed is steeper than the slope of the distance-time graph of a body with low velocity.
Reason: Slope of distance-time graph = speed of the body.
