If the collision is elastic, there is no loss in kinetic energies, which means that the total energies before and after impact are the same. So no need to worry about final velocities.
Final energy
= initial energy
= (1/2) (7.20*2.00^2+5.75*(-1.30)^2)
=19.26 joules
Answer: the total kinetic energy is 19.3 J. after collision.
The answer to your question is A.
Equation: E = m(c^2)
c = 3*(10^8)m/s
m = 5.0 kg
E = 5.0kg * [3*10^8 m/s]^2 = 45*10^16 joule = 4.5*10^17 joule
Answer: 4.5*10^17 joule
Answer:
B. objects remain in the same state of motion unless a force acts on them
Explanation:
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