science
Grade-9
Easy
Question
A ball is thrown upwards. Which of the following is false about its motion?
- Its velocity decreases to become zero when it reaches the maximum height
- Its velocity increases to become maximum when it reaches the maximum height.
- Its velocity increases when it starts falling down.
- Its velocity before touching the ground is the highest velocity it could attain in this motion.
Hint:
Its velocity increases to become maximum when it reaches the maximum height.
The correct answer is: Its velocity increases to become maximum when it reaches the maximum height.
The statement " Its velocity increases to become maximum when it reaches the maximum height" is false according to the given situation.
Justification:
When the ball is thrown upwards then it experiences deceleration and the velocity decreases continuously until it reaches its maximum height. And then again due to gravity, its velocity started to increase and it will fall down with 9.8ms-2 acceleration
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