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Ann is driving down a street at 64 km/h.
Suddenly a child runs into the street.
If it takes Ann 0.707 s to react and apply
the brakes, how far will she have moved before
she begins to slow down?
Answer in units of m.

Respuesta :

MrRoyal

Answer:

[tex]Distance = 12.5689m[/tex] before the car slow down

Explanation:

Given

Speed (S) = 64km/h

Reaction Time (T) = 0.707s

Required

Determine the distance (D)

The relationship between the given parameters is:

[tex]Speed = \frac{DIstance}{Time}[/tex]

Substitute the right values

[tex]64km/h = \frac{Distance}{0.707s}[/tex]

Make DIstance the subject of formuls

[tex]Distance = 64km/h * 0.707s[/tex]

Convert km/h to m/s

[tex]Distance = \frac{64 * 1000m}{3600s} * 0.707s[/tex]

[tex]Distance = \frac{64 * 1000m * 0.707s}{3600s}[/tex]

[tex]Distance = \frac{45248m}{3600}[/tex]

[tex]Distance = 12.5688888889m[/tex]

[tex]Distance = 12.5689m[/tex]

s412020

Answer:

12.5689

Explanation:

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