Question

a porsche 911 ca go from 0 mph to 60 mph in 3.4secs whats ur acceleration

Answer 1

The acceleration is $7.9 m/s^2$

Explanation:

The acceleration of a body is given by

$a=\frac{v-u}{t}$

where

a is the acceleration

v is the final velocity

u is the initial velocity

t is the time taken for the velocity to change from u to v

Here we first have to convert the velocities into SI units. Keeping in mind that

1 mile = 1609 m

1 h = 3600 s

We have:

$u=0 mph = 0 m/s$

$v=60 mph \cdot \frac{1609 m/mi}{3600 s/h}=26.8 m/s$

And the time interval is

t = 3.4 s

Therefore the acceleration is

$a=\frac{26.8-0}{3.4}=7.9 m/s^2$

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