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Kevin T.
Software Engineering Intern at Western Digital
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Physics (Newtonian Mechanics)
TutorMe
Question:

If a 25 kg ball is dropped from 10 meters above the ground, how long will it take for the ball to reach the ground? Assume there is no air resistance.

Kevin T.
Answer:

The mass of the ball does not affect the time it will take to fall. If we assume that the acceleration due to gravity is -9.8 m/s^2, we can simply use projectile motion equations. Final Height = Initial Height + Initial Velocity * Time + 1/2 Acceleration time Time Squared 0 = 10 + 0*t + .5 (-9.8)t^2 -10 = -4.8t^2 2.08 = t^2 1.44 = t It would take approximately 1.44 seconds for an item to reach the ground if dropped from 10 meters above the ground.

Java Programming
TutorMe
Question:

Provide pseudo-code to implement a binary search for an array.

Kevin T.
Answer:

int firstIndex =0, lastIndex = length - 1, mid; while (first <= last){ mid = (first + last)/2; if (list[mid] == item) return mid; if (list[mid] > item) last = mid -1; else first = mid +1; } return -1;

C++ Programming
TutorMe
Question:

Write a header file that allows the class to overload the following operators: << >> ==

Kevin T.
Answer:

class test{ friend ostream& operator<< (ostream&, const complexType&); friend istream& operator>> (istream&, complexType&); friend bool operator== (const stock&, const stock&); //rest of .h file }

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