The roller coaster is designed according to safety regulations that prohibit the speed of the car from exceeding 20 m/s. find the maximum value of a allowed by these regulations.

maximum allowed value of the speed in roller coaster is given as

now from kinematics we can say

here initial speed will be

acceleration is due to gravity

now we can use this to find the height

so maximum allowed height will be 20.4 m

f=ma newton

f=100x2.5=250n

what is the actual question though?