posted by Sarah on .
A 0.0160-kg bullet traveling horizontally at 396 m/s strikes a 3.95-kg block of wood sitting at the edge of a table. The bullet is lodged into the wood. If the table height is 1.06 m, how far from the table does the block hit the floor?
I had thought that to do this, you'd add the momentum of the two and set it equal the combined mass to find the velocity.
Then I set up a triangle to try to find the distance from the table and used V as the c value in the pythagorean theorem.
But the book says that isn't correct. What am I doing wrong?
yes, you mixed up your units. you divided the sqrt of a velocity and a height expecting to get a height.