Which transformation of energy occurs when a fan is turned on and the blades start to rotate?
1 answer:
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Answer:
19.5°
Explanation:
The energy of the mass must be conserved. The energy is given by:
1)
where m is the mass, v is the velocity and h is the hight of the mass.
Let the height at the lowest point of the be h=0, the energy of the mass will be:
2)
The energy when the mass comes to a stop will be:
3)
Setting equations 2 and 3 equal and solving for height h will give:
4)
The angle ∅ of the string with the vertical with the mass at the highest point will be given by:
5)
where l is the lenght of the string.
Combining equations 4 and 5 and solving for ∅:
6)
Answer:
Explanation:
Given
at
Point:
,
-- Missing Information
Required
Determine the parametric equations
Differentiate with respect to t
Let t = 1 (i.e )
To solve for x, y and z, we make use of:
This implies that:
So, we have:
By comparison:
Divide by i
Divide by j
Divide by k
Hence, the parametric equations are: