A stone is thrown with an initial speed of 15 m/s at an angle of 53 $\degree$ above the horizontal from the top of a 35 m building.If g = 9.8 m/s²and air resistance is negligible,then what is the speed of the rock as it hits the ground? A)15 m/s B)21 m/s C)30 m/s D)36 m/s

Question

Quizplus · Accepted Answer

The speed of the rock as it hits the ground can be found using energy conservation or kinematic equations. The initial kinetic energy and potential energy will convert into kinetic energy at the ground. Using the kinematic equations, the final speed can be calculated considering both horizontal and vertical components of motion. The correct calculation gives approximately 30 m/s.

A Stone Is Thrown with an Initial Speed of 15 °\degree°

A Stone Is Thrown with an Initial Speed of 15 $\degree$