A stone is thrown from a cliff and strikes the surface of the sea with a vertical velocity of 18 m s⁻¹ and a horizontal velocity v. The resultant of these two velocities is 25 m s⁻¹.
a. Draw a vector diagram showing the two velocities and the resultant.
b. Use your diagram to find the value of v.
c. Use your diagram to find the angle between the stone and the vertical as it strikes the water.