<span>From electrical energy to kinetic energy.</span>
<u>Answer</u>
48 Volts
<u>Explanation</u>
The question can be solve using the turn rule of a transformer that states;
Np/Ns = Vp/Vs
Where Np ⇒ number of turns in the primary coil.
Ns ⇒number of turns in the seconndary coil
Vp ⇒ primary voltage
Vs ⇒secondary voltage
Np/Ns = Vp/Vs
10/4 = 120/Vp
Vp = (120 × 4)/10
= 480/10
= 48 Volts
The student's answer is wrong because the unit of his answer is meter - seconds which is not unit of distance (meter).
<h3>
Total distance traveled by an object</h3>
The total distance traveled by an object projected upward is calculated from third equation of motion a shown below.
<h3>Equation for the motion of the object</h3>
v² = u² - 2gh
where;
- v is final velocity
- u is initial velocity
- g is acceleration due to gravity
at maximum height, the final velocity is zero, v = 0
0 = u² - 2gh
2gh = u²
h = u²/2g
The equation for the total distance an object has traveled during upward projection is "h = u²/2g".
<h3>Dimension of the student's answer;</h3>
d = (2vh)/g = (m/s x m) / (m/s²) = (m²/s) / (m/s²) = m.s
Thus, the student's answer is wrong because the unit of his answer is meter - seconds which is not unit of distance (meter).
Learn more about distance here: brainly.com/question/2854969
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It would take 7 or 7.5 hours
