A873-kg (1930-lb) dragster, starting from rest completes a 401.4-m (0.2509-mile) run in 4.945 s. if the car had a constant acceleration, what would be its acceleration and final velocity

To solve this problem it is necessary to apply the kinematic equations of motion.

By definition we know that the position of a body is given by

Where

Initial position

Initial velocity

a = Acceleration

t= time

And the velocity can be expressed as,

Where,

For our case we have that there is neither initial position nor initial velocity, then

With our values we have , rearranging to find a,

Therefore the final velocity would be

Therefore the final velocity is 81.14m/s

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emily ruth's annual premium is $1058.50

step-by-step explanation:

emily ruth is a female of 27 years age purchasing 20 year endowment insurance with face value $25000.

from the given table,

for females, the age of a male 3 years younger should be used.

so, we have to check for 24 year male for 20 year endowment.

it is 42.34 for every $1000 face value.

for a face value of $25000,

it is 25 * 42.34 = $1058.50

∴ emily ruth's annual premium is $1058.50