Advertisements
Advertisements
प्रश्न
The following table gives the displacement of a car at different instants of time.
| Time (s) | 0 | 1 | 2 | 3 | 4 |
| Displacement (m) | 0 | 5 | 10 | 15 | 20 |
- Draw the displacement-time sketch and find the average velocity of the car.
- What will be the displacement of the car at (i) 2.5 s and (ii) 4.5 s?
Advertisements
उत्तर
a.
Displacement-time graph
From the part AB of the graph,
Average velocity = `("Displacement at B - Displacement at A")/"Time taken"`
= `((30 - 20) m)/((6 - 4) s)`
= `(10/2)` m/s
= 5 m/s
(b)
- From the graph, the displacement of car at 2.5 s is 12.5 m.
- From the graph, the displacement of car at 4.5 s is 22.5 m.
APPEARS IN
संबंधित प्रश्न
What information about the motion of a body are obtained from the displacement-time graph?
What can you say about the nature of motion of a body if its displacement-time graph is A straight line inclined to the time axis with an obtuse angle?
From the displacement-time graph of a cyclist given below in the Figure, find The displacement from the initial position at the end of 10 s,
Figure given below shows a velocity-time graph for a car starting from rest. The graph has three parts AB, BC and CD.
State how is the distance travelled in any part determined from this graph .
A car travels at a uniform speed of 42 km/h. In 10 minutes, how much distance would it cover?
Match the following.
| 1. | Displacement | Knot |
| 2. | Light travelling through vacuum | Geometric centre |
| 3. | Speed of ship | Metre |
| 4. | Centre of gravity of geometrical shaped objects | Larger base area |
| 5. | Stability | Uniform velocity |
The displacement is zero when the initial and final positions are ______.
Give one example where the displacement is zero but the distance travelled is not zero.
An object is dropped from rest at a height of 150 m and simultaneously another object is dropped from rest at a height of 100 m. What is the difference in their heights after 2s if both the objects drop with the same accelerations? How does the difference in heights vary with time?
A man leaves his house at 6.30 a.m. for a morning walk and returns back at 7.30 a.m. after covering 4 km. The Displacement covered by him is ______.
