Object P has a mass of 7500 kg and travels at 12 m s$^{−1}$.
Object Q has a mass of 2500 kg and travels at 20 m s$^{−1}$ in the same direction as P.
P and Q collide and remain together after the collision.
What is the total kinetic energy of P and Q immediately after the collision?
1 )
70 kJ
2 )
140 kJ
980 kJ
4 )
2.0 MJ
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