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kajtazi1157
05.09.2020 •
Physics
A car is stopped at a red light. When the light turns green, it increases its speed to 45miles/hour in 15 seconds. What is the car acceleration?
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Ответ:
Acceleration = 3 miles per sec²
Explanation:
A car is stopped at a red light that means speed of the car 'u' = 0
As the light turns green, speed of the car increases from 0 to 45 miles per hour,
v = 45 miles per hour
Duration for the increase in speed from 0 to 45 miles per hour is,
t = 15 seconds
By using formula to calculate the acceleration,
v = u + at
45 = 0 + a×15
a =![\frac{45}{15}](/tpl/images/0743/5807/72fcf.png)
= 3 miles per sec²
Therefore, acceleration of the car is 3 miles per sec².
Ответ:
En el Sistema Internacional de Unidades, la unidad de medida de la fuerza es el newton que se representa con el símbolo N, nombrada así en reconocimiento a Isaac Newton por su aportación a la física, especialmente a la mecánica clásica.
Explanation: