A rock is thrown from the edge of a -high cliff with a speed of at an angle of above…

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Kinematics · Kinematics

Problem

A rock is thrown from the edge of a

20\,\text{m}

-high cliff with a speed of

30\,\text{m\,s}^{-1}

at an angle of

35^{\circ}

above the horizontal. Ignoring air resistance, how much time elapses before the rock strikes the ground below the cliff? (a)

2.0\,\text{s}

(b)

4.4\,\text{s}

(c)

3.5\,\text{s}

(d)

5.7\,\text{s}