The tension in the cables as the elevator travel upwards is 1,960 N.
The given parameters:
- Mass of the elevator, m = 200 kg
<h3>Newton's second law of motion;</h3>
Newton's second law of motion states that the force applied to an object is directly proportional to the product of mass and acceleration of the object.
The tension in the cables as the elevator travel upwards is calculated by applying Newton's second law of motion as shown below;
T = ma + mg
where;
- a is the acceleration of the elevator
- g is the acceleration due to gravity
At constant velocity, acceleration is zero (a = 0)
T = m(0) + mg
T = mg
T = 200 x 9.8
T= 1,960 N
Thus, the tension in the cables as the elevator travel upwards is 1,960 N.
Learn more about Newton's second law here: brainly.com/question/3999427
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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Answer:
10ms
Explanation:
The bird must travel the length of the train (150m), with a combined speed of 15m/s this means it will take 10s to cross an accumulated 150ms.
