13. A student stands at the edge of a GP cliff and throws a stone horizon- tally over the edge with a speed of v 18.0 m/s. The cliff is h = 50.0 m above a body of water as shown in Figure P4.13. (a) What are the coordinates of the initial h position of the stone? (b) What are the components of the initial velocity of the stone? (c) What is the appropriate analysis model for the vertical motion of the x stone? (d) What is the appro- priate analysis model for the horizontal motion of the stone? Figure P4.13 (e) Write symbolic equations for the and y components of the velocity of the stone as a function of time. (f) Write symbolic equations for the position of the stone as a function of time (g) How long after being released does the stone strike the water below the cliff? (h) With what speed and angle of impact does the stone land?

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Applications Of Reflection Of Light

When a light ray (termed as the incident ray) hits a surface and bounces back (forms a reflected ray), the process of reflection of light has taken place.

Sign Convention for Mirrors

A mirror is made of glass that is coated with a metal amalgam on one side due to which the light ray incident on the surface undergoes reflection and not refraction.