A 4.00 kg ball is moving at 3.00 m/s to the NORTH and a 5.00 kg ball is moving at 2.00 m/s to the NORTHEAST. The total momentum of the system is

Question

Quizplus · Accepted Answer

The correct answer is A because the total momentum of the system is the vector sum of the momenta of the two balls. The momentum of the 4.00 kg ball is 4.00 kg * 3.00 m/s = 12.00 kg m/s to the NORTH. The momentum of the 5.00 kg ball is 5.00 kg * 2.00 m/s = 10.00 kg m/s at an angle of 45 degrees NORTH of EAST. The total momentum of the system is therefore 12.00 kg m/s NORTH + 10.00 kg m/s at an angle of 45 degrees NORTH of EAST = 20.3 kg m/s at an angle of 69.7 degrees NORTH of EAST.

A 400 Kg Ball Is Moving at 3