If a ball is accelerating down through the air with no horizontal motion, what must be true about the net forces acting on the b
1 answer:
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Answer:
Explanation:
<u>Gravitational Potential Energy</u>
It's the capacity of an object to do work due to its relative height from a fixed reference point.
It's computed as
GPE=m.g.h
Where m is the mass of the object, h is its height and g is the acceleration of gravity,
The mass of water is given as
The height above the rocks is h=50 m. Let's compute the GPE
It should be expressed in scientific notation
The GPE at the bottom, where h=0
The change of gravitational potential energy is:
ANSWER
EXPLANATION
First, we have to make a sketch of the direction of the moments of the forces about 12m from the left in the diagram:
The sum of upward forces must be equal to the sum of downward forces. This implies that:
Also, the sum of clockwise moments must be equal to the counter-clockwise moments:
From the first equation, make TA the subject of the formula:
Substitute that into the second equation:
Substitute that into the equation for TA:
Therefore, the reaction supports at TA and TB are:
