Question

Problem 56

Answer 1

Given information

Romeo wants the pebbles to hit the window with only a horizontal component of velocity. 

He is standing at the edge of a rose garden below her window and from the base of the wall.

Step-by-step explanation

Step 1.

Let the velocity is . 

Horizontal component of velocity  

Vertical component of velocity is  

Here is the angle made with horizontal.

During the projectile motion the horizontal component  remains same.

The final will be zero , as the pebble hit the window with horizontal component of velocity.

And the final value of will be .

For the y or vertical direction from equation of motion  

Here and are final and initial velocity , is acceleration due to gravity and is height.

substituting the values