Question

On a roller coaster ride at an amusement park, a car travels from 7.6 m/s to 56 m/s in 3 seconds. whats the cars acceleration?

Answer 1

Acceleration is defined as rate of change in velocity

So we can write its formula as

$a = \frac{v_f - v_i}{t}$

here we know that

$v_f$ = final velocity = 56 m/s

$v_i$ = initial velocity = 7.6 m/s

t = time interval to change the velocity = 3 s

now we will plug in all values in the above equation

$a = \frac{56 - 7.6}{3}$

$a = \frac{48.4}{3}$

$a = 16.13 m/s^2$

so here roller coaster will accelerate at rate of 16 m/s^2 and hence correct answer is "option d"