(NEED HELP ASAP)
2 answers:
Answer:
Height of the trapezoid = 5 units
Step-by-step explanation:
Given is a picture of a trapezoid.
The two parallel sides or bases have dimensions as 10 and 6 units.
The height of the trapezoid is not given and to be found out.
We have the formula for a trapezoid with bases
and height h is
Substitute the known values in the formula for area to get h
Height of the trapezoid = 5 units
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Given that the subway stations are 930 m apart, the train have to be accerelated for half the distance and then decerelated for the rest of the distance.
Recall that the distance travelled by an object with an initial velocity, u, for a period of time, t, at an accereration, a, is given by
But, we assume that the train accelerates from rest, thus
The maximum speed is attained at half the center of the distance between subway stations (i.e. at distance = 465 m).
Thus, maximum speed = distance / time = 465 / 23.12 = 20.11 m/s.
Recall that the distance travelled by an object with an initial velocity, u, for a period of time, t, at an accereration, a, is given by
But, we assume that the train accelerates from rest, thus
The maximum speed is attained at half the center of the distance between subway stations (i.e. at distance = 465 m).
Thus, maximum speed = distance / time = 465 / 23.12 = 20.11 m/s.