A bullet with a mass of 7.00 g is fired horizontally with a speed of 420 m/s, into a wooden block with mass of 0.820 kg, initially at rest on a level surface. The bullet passes through the block and emerges with its speed reduced to 130 m/s. The block slides a distance of 47.0 cm along the surface from its initial position.
What is the coefficient of kinetic friction between block and surface?
uk = fk/n
The Attempt at a Solution
I found the acceleration of the bullet
i then thought i could find the force and then divide that by the normal force to get uk but my number was very large (141) :(
Can anyone help me on this one please.
Thank you :)