A ball is kicked from level ground with an initial speed of at an angle of above the…

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A ball is kicked from level ground with an initial speed of

20\,\text{m/s}

at an angle of

30^{\circ}

above the horizontal. Neglect air resistance and take

g=9.8\,\text{m/s}^2

. What is the total time the ball spends in the air before returning to its launch height? (a)

3.5\,\text{s}

(b)

2.0\,\text{s}

(c)

4.1\,\text{s}

(d)

1.0\,\text{s}