Answer to Question #143418 in Mechanics | Relativity for Isurini Sirisena

Question

On graph paper, draw a velocity vector for a stone fired from
a catapult at 45° to the horizontal. Your arrow should be
10 cm long, representing a velocity of 10 m s−1. Draw onto
your diagram the horizontal and vertical components that
would make up the overall velocity. Use a ruler to measure
the size of the horizontal and vertical components, and
convert these lengths into metres per second using the same
scaling.
(b) Find the horizontal and vertical velocity components for
this catapult stone by calculation, and compare with your
answers from part (a).

Answer 1

Therefore, $v_y$ and $v_x \approx 7$ m/s.

b) $v_x=v\times \cos {45\degree}= 10\times \cos {45\degree}\approx 7.07$ m/s

$v_y= 10\times \cos {45\degree}\approx 7.07$ m/s