Speed of Projectile ?

Question

A 10.0 kg wood ball hangs from a 2.10 m -long wire. The maximum tension the wire can withstand without breaking is 500 N . A 0.900 kg projectile traveling horizontally hits and embeds itself in the wood ball.

1.) What is the largest speed this projectile can have without causing the cable to break?

Answer 1

=105.41 m/s;

wrong?