Answer:
E > A = B > C > D
Explanation:
On a semicircular curve, the magnitude of force is given by the formula as :

Here, m is the mass of the vehicle
Case A : R = 60 m v = 16 m/s

Case B : R = 15 m v = 8 m/s

Case C : R = 30 m v = 4 m/s

Case D : R = 45 m v = 4 m/s

Case E : R = 30 m v = 16 m/s

The order of the magnitude of the force of the roller-coaster track on the cart from largest to smallest is :
E > A = B > C > D
1.) Transportation og goods and people
2.) Farming because of the rich minerls in its rivers
3.) The fertile soil near the river which helpes grow flax, wheat and papyrus.
When the life preserver is dropped from the helicopter, the only force acting on the object is the gravitational force. This modifies the equations of motion. Thus, the working equation is written below:
h = vt + 0.5gt²
where
v is the initial velocity
g is the acceleration due to gravity equal to 9.81 m/s²
h is the height of the fall
h = (1.46 m/s)(1.8 s) + 0.5(9.81 m/s²)(1.8 s)
h = 11.457 m
The thing to do here is to balance the eqns that is to balance the stoichometric ratios or coefficients of the cpds.
hope you understand. all the best.
They were able to find the orbit of a comet and predict the year of its return.