1. Un automóvil que se desplaza con velocidad constante aplica los frenos durante 25.0s y recorre 400m hasta detenerse.
Calcular:
a) ¿Qué velocidad tenía el automóvil antes de aplicar los frenos?
b) ¿Qué desaceleración produjeron los frenos?
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ayudenme plis​

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