mariamfathy2092 mariamfathy2092

21-03-2021
Physics

contestada

Q6) A driver driving a car with a speed of 60 km/h. If the driver
accelerates at 2 m/s^2, how much time does the driver need to get the
speed of 90 km/h?

Respuesta :

keijosalonen keijosalonen

21-03-2021

Answer: 4.2 s

Explanation: 60 km/h = 16.67 m/s and 90 km/h = 25 m/s

Change of velocity dv is 25-16,67 = 8,33 m/s.

Acceleration a= dv / t And t = dv/a

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