Under the assumption that the three rocks are dropped from the same height, they will hit the ground at the same speed. The gravity of Earth is virtually the same for any object that is small compared to the size of the Earth. The acceleration will change with the distance from the Earth, but this change is so small for the range of heights we work with (consider the range of heights from sea level to the tip of Mount Everest) that we can take the average value and assume it to be constant. This constant value of acceleration due to Earth's gravity is 9.80665m/s²
Because the objects fall under the same constant acceleration, they will hit the ground at the same speed.
Answer:
Explanation:
We have an uniform circular motion, therefore, the pebble’s speed is given by the distance traveled in a revolution 
and the period (T), since this is the time pebble’s takes to complete a revolution:
The period is inversely proportional to the frequency:
So, we have:
Recall that the radius is the half of the diameter and one revolution per is equal to one Hz:
The centripetal acceleration is defined as:
To find the acceleration, we will use the formula
F=ma
Here the net force will be 40N (50 - 10)
F = ma
40 = 4a
40/4 = a
10 m/s^2 = a
Hope you understood !
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Whats the point of being either of them?
If your Beautiful, you cant look at yourself...
And if your ugly, no one else can see you...
I'd rather not exist LOL XD
