# A 1-kg ball is released from a height of 6 m, and a 2-kg ball is released from a height of 3 m. Air resistance is negligible as they fall. Which of the following statements about these balls are correct? A) Both balls will reach the ground with the same kinetic energy. B) Both balls will reach the ground with the same speed. C) As they reach the ground, the 1-kg ball will be moving faster than the 2-kg ball. D) As they reach the ground, the 1-kg ball will have more kinetic energy than the 2-kg ball because it was dropped from a greater height. E) Both balls will take the same time to reach the ground.

A) True B) false C) True D) False E) False

Explanation:

A) We know that the potential energy is transformed into kinetic energy since the ball is released.

This energy will be the same at the moment that the ball is about to hit the floor. Therefore there was a transformation from potential to kinetic energy

EK1 = EP1

With the 2kg ball happens the same

Velocity at the moment when is about to hit the floor (due to the energy transform) will be:

A) Since both balls have the same potential energy, they will have the same kinetic energy

B) The velocities are differents as they were calculated before.

C) Therefore the 1 kg ball moves faster as it reaches the ground.

D) The kinetic energy is the same for both balls as it was calculated before.

E) The 2 kg ball will reach the ground first, since it is closer to the ground

With the velocities calculated in the previous steps we have now:

## Related Questions

What is the force that makes earth orbit the sun

Gravity

Without gravity, the earth would be flying everywhere. The Sun's gravity pulls on the planets, just as Earth's gravity pulls down anything that is not held up by some other force and keeps you and me on the ground.

- R3KTFORGOOD ☕

According to Lewin's Change Model, an organization must deliberately change old habits, learn new work methods, and accept the new work methods as parts of the job.

True

Explanation:

The Kurt Lewin Model: Defines change as a modification of the forces that maintain the behavior of a stable system.

Which is the product of two types of forces that help to make the change (F. Drivers) and those that prevent change from occurring (F restrictive) that want to maintain the same state of the organization.

When both forces are balanced, the levels of behavior are maintained and a quasi-stationary equilibrium is achieved according to Lewin. To modify it you can increase the forces that cause the change or decrease the forces that prevent it or change both tactics. Lewin proposes a three-phase plan to carry out the planned change

Defrosting: involves reducing the forces that keep the organization at its current level of behavior.

Change or movement: It consists of moving towards a new state or new level within the organization with respect to behavior patterns and habits, behaviors and attitudes.

Recongelación: The organization is stabilized in a new state of equilibrium where culture, norms, policies and organizational structure are used.

State Kepler’s three laws in your own words.

Stated

Explanation:

1st law- 1st law states that the planet orbit around the sun in an elliptical orbit or oval to be exact, with sun situated at one of the focus.

2nd law- according to 2nd law the area vector of the planets sweeps equal area in equal time.

3rd law- if we square the "year"(orbit period) of each planet and divide it with the cube of distance to the sun, we will get the same number for each planet.

Which activity can be termed as an economic activity?