State which of the following situations are possible and give an example for each of these: - an object with a constant acceleration but with zero velocity
- an object moving with an acceleration but with uniform speed.
- an object moving in a certain direction with an acceleration in the perpendicular direction.
- an object with a constant acceleration but with zero velocity
- an object moving with an acceleration but with uniform speed.
- an object moving in a certain direction with an acceleration in the perpendicular direction.
Solution and Explanation
(a) Possible.
When a ball is thrown up at maximum height, it has zero velocity, although it will have constant acceleration due to gravity, which is equal to \(9.8\) \(m/s^2\).
(b) Possible.
When a car is moving in a circular track, its acceleration is perpendicular to its direction.
(c) Possible.
A car is moving in a circular track, its acceleration is perpendicular to the direction of motion.
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