Answer:
19.8m/s
Explanation:
Given parameters:
Mass of the ball = 10kg
Height of the rail = 20m
Unknown:
Velocity at the bottom of the rail = ?
Solution:
The velocity at the bottom of the rail is its final velocity.
Using the appropriate motion equation, we can find this parameter;
V² = U² + 2gH
V is the final velocity
U is the initial velocity
g is the acceleration due to gravity
H is the height
the ball was rolled from rest, U = 0
V² = O² + 2 x 9.8 x 20
V = 19.8m/s
Any chemical reaction in which the oxidation number of an atom,molecule,or ion changes by gaining or losing an electron
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When two clear substance combines, an insoluble solid is formed that settle downs as a ________.
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When two clear substance combines, an insoluble solid is formed that settle downs as a <u>precipitate</u><u>.</u>
<em>→</em><em>A </em><em>precipitate</em><em> </em><em>is </em><em>a </em><em>substance</em><em> </em><em>to </em><em>be </em><em>deposited</em><em> </em><em>in </em><em>solid</em><em> </em><em>form </em><em>from </em><em>a </em><em>solution</em><em>.</em>
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