Energy

What is the Law of Conservation of Energy?

Energy cannot be created nor destroyed only transformed to other forms.

Instead of rolling down the ramp over the step, imagine the ball falls off the back of the ramp directly to the ground. What is the amount of potential energy remaining after the ball lands on the ground?

0 Jules

Which example involves the transformation of chemical energy directly into light energy?

A glow stick

Mr. Mann's science students were experimenting with speed. They set up a 1 meter (100 cm) track. The students used balls instead of cars. The balls were different sizes and made of different materials. Four at a time, students rolled balls around the track to see which had the fastest and slowest speeds. Some of their data are shown in the table. Which ball will take the longest to complete one lap around the track?

Ball 2

A ball is projected into the air. Describe the change(s) in potential and kinetic energy.

Kinetic energy decreases as potential energy increases; once at the top, potential energy decreases as kinetic energy increases.

Based on the diagram of a roller coaster car on a roller coaster track, what statement is true?

The car at point C has less kinetic energy than the car at point B.

A drawn bow possesses mechanical energy in the form of _______________. After the arrow is released, the energy is transformed into _________________.

elastic potential energy; kinetic energy

Maria's father started a fire in the fireplace. He crumpled some paper, lit a match, and soon the logs in the fireplace were burning. In this case, the stored chemical energy in the logs was changed into

heat and light energy

A pole vaulter runs forward, plants his pole, rises in the air and lands. What point represents his greatest amount of gravitational potential energy?

just before he starts to fall to the ground

What form of energy does a compressed spring have?

potential energy