Question

# A 2.0 g bullet leaves the barrel of a gun at a speed of270 m/s. (a) Find its kinetic energy. = J (b) Find the average force exerted by the expanding gases on thebullet as it moves the length of the 50 cm long barrel. = N

Other
A 2.0 g bullet leaves the barrel of a gun at a speed of270 m/s.
(a) Find its kinetic energy.
= J
(b) Find the average force exerted by the expanding gases on thebullet as it moves the length of the 50 cm long barrel.
= N

$$K = (\frac{1}{2}) m v^{2}= (\frac{1}{2}) (0.002 kg) (270m/s)^{2} =$$ $$72.9\ Joules$$
Work = K = force *distance so: $$force = K / dist = 72.9\ Joules / 0.50\ meter = 145.8\ Newtons$$
{"found_math": true, "script_math_tex": 0, "script_math_asciimath": 0, "math_annotations": 0, "math_alttext": 0, "mathml": 0, "mathjax_tag": 0, "mathjax_inline_tex": 0, "mathjax_display_tex": 1, "mathjax_asciimath": 0, "img_math": 0, "codecogs_latex": 0, "wp_latex": 0, "mimetex.cgi": 0, "/images/math/codecogs": 0, "mathtex.cgi": 0, "katex": 0, "math-container": 0, "wp-katex-eq": 0, "align": 0, "equation": 0, "x-ck12": 0, "texerror": 0}