While entering a freeway, a car accelerates from rest at a rate of 4.8 m/s2 for 12.0 s. Hint: on all these kinematic problems, keep and check your units. Check whether the answer is reasonable. You can always check to see if your answer satisfies other kinematic equations.

Question

Carsen Johns

Physics

10 December, 23:43

While entering a freeway, a car accelerates from rest at a rate of 4.8 m/s2 for 12.0 s. Hint: on all these kinematic problems, keep and check your units. Check whether the answer is reasonable. You can always check to see if your answer satisfies other kinematic equations.

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Answers (1)

Know the Answer?

Skippy · Answer 1

The car reaches the final speed of 207.36 km/h

As it is less than the top speed of many cars, Yes, the answer is reasonable

Explanation:

V = U + A*T. where

V is final velocity

U is initial velocity

A is acceleration

T is time

(0) + (12) (4.8) = 57.6 m/s

57.6 m/s = 207.36 km/h