Question

From the top of a tower of height 490 m, a shell is fired horizontally with a velocity 100 m/s. At what distance from the bottom of the tower, the shell will hit the ground? (Give the answer in m)

• A. 1000
• B. 100
• C. 10

Answer 1

The correct option is A 1000

Using equation, S = ut + $\frac{a{t}^2}{2}$, we get

490 = 0 + $\frac{9.8\times t^2}{2}$

or $t^2$ = 100

or t = 10 s

It takes 10 seconds to reach the ground.

Now,

horizontal distance = horizontal velocity × time

= 100 m/s × 10 s = 1000 m

The shell will strike the ground at a distance of 1000 m from the bottom of the tower.