Question

A marble rolls down an incline, starting from rest over a distance of 12-centimeters in 1.2-seconds. How fast is it traveling at the bottom of the incline? (Please solve in terms of cm/s and remember that how fast is speed which a positive value.)

Answer 1

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,

$v=\dfrac{d}{t}\\\\v=\dfrac{12\ cm}{1.2\ s}\\\\v=10\ cm/s$

So, the speed of the marble at the bottom of the incline is 10 cm/s.