Problem 4-11 - Free fall - Part 2 - (A)

A ball is thrown from a balloon with an initial unknown velocity. The ball accelerates at \(9.80\;m/s^2\) downward for \(2.00\; s\), at which time its instantaneous velocity is \(24.0\; m/s\) at an angle of \(45.0^\circ\) below the horizontal. Determine the magnitude and direction of the initial velocity.

Accumulated Solution

\(v = v_0 + at\)


The final velocity is given and the initial velocity is unknown.


We need a coordinate system in which to solve the problem. Which of the following is best (remember there is actually no incorrect one).

4 possible coordinate systems; A, B, C and D