In a ballistics test, a 25.0 g bullet traveling horizontally at 1100 m/s goes through a 30.0 cm-thick 450 kg stationary target and emerges with a speed of 900 m/s. The target is free to slide on a smooth horizontal surface.(adsbygoogle = window.adsbygoogle || []).push({});

How long is the bullet in the target?

i tried to use this equation : t = d/v_avg

900-1100 / 2 = -100 = vavg

.3=-100 t

t= .003

but it is saying that it is incorrect. can someone tell me what i am doing wrong?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Momentum ballistics speed question

**Physics Forums | Science Articles, Homework Help, Discussion**