Question

A bullet is fired horizontally from a rifle at a distant target. Ignoring the effect of air resistance, which of the following are values of horizontal acceleration & vertical acceleration ?

• A. $10m{s}^{-2}$ & $10m{s}^{-2}$
• B. $10m{s}^{-2}$ & $0m{s}^{-2}$
• C. $0m{s}^{-2}$ & $10m{s}^{-2}$
• D. $0m{s}^{-2}$ & $0m{s}^{-2}$

Answer 1

The correct option is C $0m{s}^{-2}$ & $10m{s}^{-2}$

Assuming no air resistance, horizontal acceleration must be 0 (no forces acting horizontally)
The vertical component is affected by gravity and acceleration must be equal to 'g' (acceleration due to gravity) $=10m{s}^{-2}$
Hence answer is $0m{s}^{-2}and10m{s}^{-2}$
Option C is correct.