Answer:
10 cm/s
Explanation:
Given that,
Initial speed of a marble, u = 0
It starts from rest over a distance of 12-centimeters in 1.2-seconds.
We need to find its speed at the bottom of the incline. Let it is v. Speed of an object is equal to distance covered divided by time taken. So,
[tex]v=\dfrac{d}{t}\\\\v=\dfrac{12\ cm}{1.2\ s}\\\\v=10\ cm/s[/tex]
So, the speed of the marble at the bottom of the incline is 10 cm/s.
