When the acceleration is 2 m / S2 and the displacement is 20 m in the first four seconds, the initial velocity is 0___ M / s, the initial velocity in the second second second is___ m/s The acceleration is 2m / S2 and the displacement is 20m in the first four seconds Then the initial velocity is______ m/s, The velocity at the beginning of the second second is______ m/s, The final velocity in 4S is______ m/s, The ratio of the first 2 s displacement to the second 2 s displacement is 0______ | Math enthusiast | Mathematical art

When the acceleration is 2 m / S2 and the displacement is 20 m in the first four seconds, the initial velocity is 0_ M / s, the initial velocity in the second second second is_ m/s The acceleration is 2m / S2 and the displacement is 20m in the first four seconds Then the initial velocity is m/s, The velocity at the beginning of the second second is m/s, The final velocity in 4S is m/s, The ratio of the first 2 s displacement to the second 2 s displacement is 0

The instantaneous velocity at the middle time = the velocity at the end of the second second second = the velocity at the end of the first second V1 = VO + A * T1 = 1 + 2 * 1 = 3m / s the average velocity at the end of the fourth second V4 = VO + A * T4 = 1 + 2 * 4 = 9m / S

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