# Problem: A rock with mass 2.0 kg is at rest on a horizontal frictionless surface. A bullet with mass 0.100 kg is traveling due east with a speed of 400 m/s just before it strikes the rock. Just after the collision between the bullet and the rock, the bullet is moving south with a speed of 300 m/s. What is the speed of the rock just after the collision with the bullet? A) 5.0 m/s B) 15.0 m/s C) 25.0 m/s D) 59.2 m/s E) None of the above answers

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###### Problem Details

A rock with mass 2.0 kg is at rest on a horizontal frictionless surface. A bullet with mass 0.100 kg is traveling due east with a speed of 400 m/s just before it strikes the rock. Just after the collision between the bullet and the rock, the bullet is moving south with a speed of 300 m/s. What is the speed of the rock just after the collision with the bullet?

A) 5.0 m/s

B) 15.0 m/s

C) 25.0 m/s

D) 59.2 m/s

E) None of the above answers