Answer:
57 kg
Explanation:
Mass of seesaw = 20 kg
Length of seesaw = 4 m
Mass of child on the longer end = 30 kg
The weight of the seesaw acts at the center i.e. 2m
The algebraic sum of moments of all forces about any point is zero, hence, using the fulcrum as the reference point:
[x * 9.8* 1.5] - [20 * 9.8* (2.5 - 2)] - [30 * 9.8 * 2.5] = 0
=> 14.7x = (20*9.8*0.5) + 735
14.7x = 98 + 735
14.7x = 833
=> x = 833/14.7
x = 57 kg
The gravitational potential energy of the rock is:
490 J at 50 m
196 J at 20 m
9.8 J at 1 m
Explanation:
The gravitational potential energy (GPE) of an object is the energy possessed by the object due to its position in the gravitational field.
For an object near the Earth's surface, the GPE is given by
where
m is the mass of the object
is the acceleration of gravity at Earth's surface
h is the heigth of the object relative to the ground
For the rock in this problem,
m = 1 kg
So its GPE at h = 50 m is
The GPE at h = 20 m is
While the GPE at h = 1 m is
Learn more about gravitational potential energy:
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The answer is a. Chemical energy.
Photosynthesis is a process in plants wherein light energy is converted to chemical energy, which is then stored as glucose. This is stored in the chloroplasts.
Photosynthesis is divided into two stages: the light and dark stage. In the light stage, the light energy is converted into ATP and NADPH, these are like the energy cells of the plant. After the light stage, the ATP and NADPH that were produced are used in the dark stage. The dark stage will use these energy cells to transform carbon dioxide into sugar.
The mass of the cylinder increased by a factor of 3, the gravitational potential energy increases by a factor of 3.
The given parameters:
- <em>Initial mass of the cylinder, m₁ = 1.0 kg</em>
- <em>Final mass of the cylinder, m₂ = 3.0 kg</em>
The gravitational potential energy of an object is calculated as follows;
P.E = mgh
where;
<em>m</em><em> is the mass </em>
<em>g</em><em> is acceleration due to gravity</em>
<em>h</em><em> is the height of the cylinder</em>
<em>when the </em><em>mass </em><em>= 1 kg</em>
P.E = 1 x g x h
P.E = gh
<em>when the </em><em>mass </em><em>= 3 kg</em>
P.E = 3 x gh
P.E = 3gh
Thus, when the mass of the cylinder increased by a factor of 3, the gravitational potential energy increases by a factor of 3.
Learn more about gravitational potential energy here: brainly.com/question/19768887