Question

A projectile travels in the horizontal direction at a velocity of 200.0 meters/second from a cliff that is 200.0 meters high. After how many seconds will the projectile reach the ground level?

A. 4.2 seconds

B. 6.2 seconds C. 6.4 seconds D. 9.2 seconds

Answer 1

Option (c) is correct.The projectile will reach the ground after a time of 6.4 seconds.

Step-by-step explanation:

Height of cliff= 200 m

initial velocity along vertical=0

initial velocity of horizontal=200 m/s

we use the kinematic equation;

h= Vit +1/2 gt²

200=0(t) + 1/2 (9.8)t²

4.9t²=200

t²=40.82

t=6.4 seconds