A 4 kg ball is moving east at 12 m/s and collides in mid-air with a 6 kg ball moving north at 8 m/s. After the collision, the two balls stick together.
What is the magnitude and direction of their velocity immediately after the collision?

Question

A 4 kg ball is moving east at 12 m/s and collides in mid-air with a 6 kg ball moving north at 8 m/s. After the collision, the two balls stick together. 
 What is the magnitude and direction of their velocity immediately after the collision?

Accepted Answer

6.8  m/s ,  4 5 degrees  north of east

Answer

5.0  m/s ,  4 5 degrees  north of east

Answer

8.2  m/s ,  6 0 degrees  north of east

Answer

7.5  m/s ,  3 0 degrees  north of east

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A 4 kg ball is moving east at 12 m/s and collides in mid-air with a 6 kg ball mo...

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