Question

16. Why does the number of carts matter when designing a roller coaster track? (Hint: PE = mass x gravity x height and KE = /2 mass x velocity ^2)
Choose 2 correct statements.

A. Adding carts increases the mass and decreases the total energy in the system.

B. Adding carts increases the mass and increases the total energy in the system.

C. Removing carts increases the mass and decreases the total energy in the system.

D. Removing carts decreases the mass and decreases the total energy in the system.​

Answer 1

Answer:

Answer B. Adding carts increases the mass and increases the total energy in the system.

Explanation:

By adding carts, the mass of the system is larger, and therefore, both the potential energy and the kinetic energy of the system will increase, thus contributing to larger final velocities as the carts roll down the tracks.

The correct answer is therefore the one shown in answer B:

Adding carts increases the mass and increases the total energy in the system.