A motor car of mass 25kg is moving with a certain velocity. It is brought to rest by the application of brakes, within a distance of 20m when average resistance being offered to it is 500n .What is the velocity of motor car?
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a = -(F / m)
= -500 N / 25 kg
= -20 m/s²
[-ve sign because it’s retardation]
a = v² - u² / (2S)
-20 m/s² = (0 - u²) / (2 × 20 m)
u² = (80 m²/s²)
u = 8.94 m/s
Velocity of motor car is 8.94 m/s
= -500 N / 25 kg
= -20 m/s²
[-ve sign because it’s retardation]
a = v² - u² / (2S)
-20 m/s² = (0 - u²) / (2 × 20 m)
u² = (80 m²/s²)
u = 8.94 m/s
Velocity of motor car is 8.94 m/s
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