Dear friends, Please read our latest blog post for an important announcement about the website. ❤, The Socratic Team

# A rifle is aimed horizontally at a target 50 m away. The bullet hits the target 2.0 cm below the aim point. What was the bullet's flight time, and the speed it left the barrel?

Then teach the underlying concepts
Don't copy without citing sources
preview
?

#### Explanation

Explain in detail...

#### Explanation:

I want someone to double check my answer

36
Michael Share
Nov 17, 2015

$\left(a\right) .$

$0.064 \text{s}$

$\left(b\right) .$

$781.2 \text{m/s}$

#### Explanation:

$\left(a\right) .$

To get the time of flight we consider the vertical component of motion:

$s = \frac{1}{2} \text{g} {t}^{2}$

$\therefore t = \sqrt{\frac{2 s}{g}}$

$t = \sqrt{\frac{2 \times 0.02}{9.8}}$

$t = 0.064 \text{s}$

$\left(b\right) .$

The horizontal component of velocity is constant so:

$v = \frac{s}{t} = \frac{50}{0.064} = 781.2 \text{m/s}$

• An hour ago
• An hour ago
• An hour ago
• An hour ago
• 6 minutes ago
• 14 minutes ago
• An hour ago
• An hour ago
• An hour ago
• An hour ago
• An hour ago
• An hour ago
• An hour ago
• An hour ago
• Ear
• Tri
• Cal
• Che
• Org
• U.S
• Wor
• Bio
• Geo
• Sta
• Ast
• Phy
• Psy
• Ast
• Eng
• Env
• Ana
• Alg
• Pre
• Pre
• Soc