physics question 2

Question

A juggler throws a bowling pin straight up with an initial speed of 8.40 m/sm/s.For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Up-and-down motion in free fall.

How much time elapses until the bowling pin returns to the juggler's hand?

Answer 1

The initial velocity of the ball , Vo = 8.4 m/s

The final velocity of the babb, Vf = -8.4 m/s

Now we use the following equation:

Vf = g t + Vo

where g is -9.8 m/s^2

Plug in the numbers in the equation we get:

-8.4 = -9.8 t + 8.4

Now we need to solve for t

-8.4 = -9.8 t + 8.4

-16.8 = -9.8 t

t = 1.71 s