Physics, 25.12.2021 18:20, bigemma03

1. The acceleration equation of a certain particle is a=2t, after 4s, its velocity reaches 20m/s, then the initial velocity of the particle movement is ) ms B Sms 2.

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1. The acceleration equation of a certain particle is a=2t, after 4s, its velocity reaches 20m/s, th...