helokit
2nd April 2006 - 09:32 PM
A 20.0 g bullet strikes a 0.592 kg block attached to a fixed horizontal spring whose spring constant is 6.69 103 N/m and sets it into vibration with an amplitude of 21.1 cm. What was the speed of the bullet before impact if the two objects move together after impact?
constant is 103
solidstrongbad
6th April 2006 - 11:24 PM
off the top of my head about 300m/s im not sure tho
Moseley
7th April 2006 - 12:58 PM
I'm not going to guess the answer, but am going to request some thinking from you.
You should be able to calculate how much force is required to deform the spring to the required amplitude. This will allow you to calculate the velocity of (the bullet + the block) and from that you can calculate the bullet's velocity prior to impact by conservation of momentum considerations.
Please show some thoughts or working in future.