The motion of roller coasters depends upon the conversion of potential and kinetic energy. a 100-kg car starts from rest at the top of a hill with a height of 50 m. which of the following is this car's kinetic energy at the bottom of the hill?

K=49,000 Joule

Explanation:

Kinetic and Gravitational Potential Energy

The principle of conservation of the mechanical energy states that the mechanical energy of a system of particles remains unaltered unless some external non-conservative forces acting on the system.

The total mechanical energy present in the roller coasters is the sum of their kinetic and gravitational potential energies:

If the roller coaster decreases its height, the speed will increase and compensates for the loss of potential energy. If the roller coaster increases its height, it will go slower and eventually stop until running out of kinetic energy.

We know the car starts from rest at the top of the hill of 50 m. This implies that the mechanical energy is

When it reaches the bottom of the hill, the potential energy is zero, thus the car has only kinetic energy.

Kinetic energy at the bottom = 49,000 Joule

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me

in order to follow the instructions and complete the statements, i need to use data from table c of your student guide. can you think of a way to let me see your student guide for a while ? i can't answer the question without the data in table c.