Recent content by jeffholmes1

Today in physics class we were discussing the conservation of energy using a ball on a spring as the example. When the instructor completed the problem one of the students stated that the value of K (spring constant) that we found was different (by a factor of 2) than the value of K calculated...

That was the ticket. Thank you very much. I knew that there was a kinetics equation that applied, but always forget the one you provided.

Here is the actual problem statement: In a ballistics test, a 20g bullet traveling horizontally at 1200m/s goes through a 40 cm thick 450kg stationary target and emerges with a speed of 900m/s. The target is free to slide on a smooth horizontal surface. a.) how long is the bullet in the...

I have a problem where a 20 gram bullet is fired at 1200m/s throguh a 45 gram block and emerges at 900m/s. I am asked to find the time that the bullet took to pass through the block which leads into a follow-on question about finding total force applied. I do not even know how to approach...