per Second Velocity: The velocity is a vector quantity and it is defined by the

Question

per Second Velocity: The velocity is a vector quantity and it is defined by the displacement (Ax) over the total time (Ap), In other words, velocity is the rate at which a it is defined as follows n object is changing its displacement. Mathematically. At t-ti The velocity is just the speed with a direction. Problem 4: Find the velocity of the car in problem 2, if you know that it reached its final position in 2 seconds. What are the units for velocity? (Remember that you should indicate the direction along with the magnitude for vector quantities.) Show your work for full credit. Date Modified: May 14, 2017 Position, Velocity, and Acceleration Page 2 of 20

Explanation / Answer

SOLUTION (4)

Let us go to the basics first.

Velocity = (Final position - Initial position)/ time interval

Unit of velocity = metres/second (Answer)

But to find velocity of car, we require the data given in problem 2 such as initial position and final position.

SOLUTION(5)

Velocity when you stopped running = Final velocity = 0 m/s (Answer)

(Reason: velocity becomes zero when you stop running)

Acceleration during the motion

= (Final velocity - Initial velocity) / (Time interval)

= (0 - 2) / 5

Thus, acceleration = - 0.4 m/s2 (Answer)

Unit = m/s2 (Answer)

Since acceleration is negaive, so direction of acceleration is opposite to the west i.e. EAST. (Answer)

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