How long is tina, a ballerina, in the air when she leaps straight up with a speed of 1.8 m/s?

0.367 s

Explanation:

Tina has a unifomrly accelerated motion along the vertical direction, with initial velocity and constant acceleration downward (acceleration due to gravity). Its position at time t is given by the equation:

where is the initial height, so we can remove it from the equation:

We need to find how long is Tina in the air, which means we have to find the time t at which Tina reaches the ground again, so the time t at which :

which has two solutions:

--> time at which Tina starts its motion, so we don't consider this one

well, you would divide 135 by 33 to get your answer. then that is how many seconds it would take. boardman should fly about 132 m or 4.090909090909091 seconds.

a.   mass number from atomic number