The speed-time graph for a car is shown is Fig.
- Find how far does the car travel in the first 4 seconds. Shade the area on the graph that represents the distance travelled by the car during the period.
- Which part of the graph represents uniform motion of the car?
- Find how far does the car travel in the first 4 seconds. Shade the area on the graph that represents the distance travelled by the car during the period.
- Which part of the graph represents uniform motion of the car?
Solution and Explanation
(a)
The shaded area which is equal to \(\frac{1 }{ 2} \times 4 \times 6 = 12 \;m\) represents the distance travelled by the car in the first \(4\) \(s\).
(b)
The part of the graph in red colour between time \(6\) s to \(10\) \(s\) represents uniform motion of the car.
Top CBSE Class IX Questions
- The following table gives the lifetimes of 400 neon lamps:
Length (in hours)
Number of lamps
300 − 400
14
400 − 500
56
500 − 600
60
600 − 700
86
700 − 800
74
800 − 900
62
900 − 1000
48
(i) Represent the given information with the help of a histogram.
(ii) How many lamps have a lifetime of more than 700 hours? - Give an example to show that even as a young girl Santosh was not ready to accept anything unreasonable.
- Where was Abdul Kalam’s house?
- What do you think Dinamani is the name of? Give a reason for your answer.
Why was Santosh sent to the local school?
Concepts Used:
Speed and Velocity
The rate at which an object covers a certain distance is commonly known as speed.
The rate at which an object changes position in a certain direction is called velocity.
Difference Between Speed and Velocity:
Read More: Difference Between Speed and Velocity