A positron is a particle that has the same mass but opposite charge of an electron. An electron and a positron are shot directly toward each other by a particle accelerator. They start very far from each other, each with a kinetic energy of

Complete Question

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Explanation:

From the question we are told that:

Kinetic energy

Generally, the equation for Total Energy is mathematically given by

Where

Mass of an electron in MeV

And

Electron Charge

Therefore

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explanation:

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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