Answer:
23.3 g/cm3
Explanation:
First of all, this should be in the math section. I just so happen to also be good at math. Cheers!
Acceleration is defined as rate of change in velocity
So we can write its formula as

here we know that
= final velocity = 56 m/s
= 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



so here roller coaster will accelerate at rate of 16 m/s^2 and hence correct answer is "option d"
No because it is dense and opaque