Question

Consider a body projected horizontally with a velocity20 m/s from the top of tower of height 200m .For this body
Horizontal component of velocity after 4s is ___m/s.

Answer 1

Answer:

Given:

An object is thrown at 20 m/s from top of tower oh height (200 m)

To find:

Horizontal component of velocity after

4 seconds

Concept:

Velocity changes only when an external force or acceleration is given on an object. This is as per Newton's First Law.

Now, an air - ground projectile experiences acceleration due to gravity only in the y - axis.

It doesn't experience any acceleration along the x - axis.

Calculation:

So, when we say that the body is thrown horizontally, we mean that the projectile has its initial Velocity along x axis.

Since there is no acceleration along x axis, the horizontal component will remain constant even after 4 seconds.

Final answer is 20 m/s after 4 seconds.