Arock is thrown at a window that is located 18.0 m above the ground. the rock is thrown at an angle of 40.0° above horizontal. the rock is thrown from a height of 2.00 m above the ground with a speed of 30.0 m/s and experiences no appreciable air resistance. if the rock strikes the window on its upward trajectory, from what horizontal distance from the window was it released?

a. 29.8 m
b. 27.3 m
c. 48.7 m
d. 71.6 m
e. 53.2 m

To solve the problem it is necessary to apply the kinematic equations of linear descriptive motion. With the components of speed we can find both time and distance that separates them. The two components given are:

Applying the vertical displacement equation we have to

Replacing we have,

Solving for t,

Through the horizontal component we can find the displacement which is given as,

Therefore the correct answer is B.

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.

the answer is b, have negligible mass