science
Grade-9
Easy
Question
Which of the following is not an accelerated motion?
- Free fall
- Motion of the Moon around the Earth
- A car moving at a velocity of 20 m/s
- A ball thrown upwards
Hint:
A car moving at a velocity of 20 m/s
The correct answer is: A car moving at a velocity of 20 m/s
A car moving at a velocity of 20 m/s is the only case given in which there is no accelerated motion as the velocity remains constant.
whereas in freefall the object falls down with an acceleration of 9.8ms-2.
The motion of the Moon around the Earth is an accelerated motion as the velocity changes.
When a ball throws up it goes in an upward direction with an acceleration of -9.8ms-2.
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