Copy of GR7 SCI Unit 2 Post Assessment (11/17/2025)

As mass increases, kinetic energy increases.

Mass and kinetic energy are not related.

The 15,000-kilogram train moving at 20 miles per hour because even though both the train and the car are moving at the same speed, the train has more mass. With its higher mass, the train will have more kinetic energy than the car.

The 5,000-kilogram car moving at 20 miles per hour because the car has less mass then the train and can move faster if it wanted to.

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Car B had more energy than Car A when it hit because it had a much bigger mass than Car A.

Both cars had the same energy because they were traveling approximately the same speed.

The walking middle schooler has more kinetic energy than the one playing video games.

Kinetic energy does not depend on speed.

The kinetic energy is transferring to the surrounding air molecules only.

The kinetic energy is transferring to the adjacent spheres and surrounding air molecules, as well as, being converted into sound and thermal energy.

The temperature of the spheres increases after making contact with another sphere; this shows that some of the kinetic energy transferred to thermal energy.

The temperature of the spheres remains unchanged; this shows that the kinetic energy keeps increasing.

Student A is correct because the energy is changing from gravitational potential energy to kinetic energy and from kinetic energy to gravitational potential energy as it swings.

Student B is correct because the the energy is changing from gravitational potential energy to kinetic energy and from kinetic energy to gravitational energy as it swings. However, each full swing is a little lower which means that some energy is being transferred to air molecules.

The kinetic energy is unaffected by speed.

The kinetic energy decreases, indicating that energy is transferred away from the car.