Question

Assume that there is no external unbalanced force working in the horizontal direction then what happen

Answer 1

hi,

https://www.khanacademy.org/math/arithmetic-home/arith-review-decimals/arithmetic-significant-figures-tutorial/v/significant-figures

go on the above link to get ur answer

please mark my ans as brainlist

Answer 2

 If there is no external force on the particle then its state will not change according to the Law of Inertia. ...
In case of projectile motion the vertical component of particle's velocity changes continuously because of the force acting in vertical direction which is its own weight .

Law of inertia