Energy Graphs

Which graph BEST shows the relationship of kinetic energy (solid line) to potential energy (dotted line) as a hawk dives downward toward its prey and then returns to its original position in the air?

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Tags

NGSS.MS-PS3-1

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?

• 100J

• 0J

• 25J

• 50J

Tags

NGSS.MS-PS3-2

According to the picture, how would the gravitational potential energy of the car change if its weight was doubled?

• The gravitational potential energy would be cut in half.

• The gravitational potential energy would stay the same

• The gravitational potential energy would be doubled.

• The gravitational potential energy would be increased by 750.

Tags

NGSS.MS-PS2-4

At what point on the hill will the car have zero gravitational potential energy?

• At the bottom of the hill.

• At the top of the hill.

• Half-way down the hill.

• It will never have zero gravitational potential energy

Tags

NGSS.HS-PS2-4

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

• Potential energy decreases and kinetic energy increases.

• Kinetic energy increases and potential energy decreases.

• Potential energy decreases while kinetic energy increases; then kinetic energy decreases and potential energy increases.

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

A new cannon was being developed in a science lab. The instructor wanted to do some testing of the cannon's ability to launch objects with different masses. The instructor used tennis balls and filled them with lead, rocks, and styrofoam. The fourth tennis ball had nothing in it. The instructor fired each tennis ball with the same speed and measured the kinetic energy of each over a period of one second. Determine which tennis ball had rocks in it and explain.

• Green represents rocks because it is not as dense as lead and would likely have less mass than lead.

• Green represents rocks because the rocks would occupy less volume than lead but more than styrofoam.

• Purple represents rocks because it traveled faster than all the other objects since it is less dense.

• Purple represents rocks because it has more mass than all the other objects.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5

A soap box derby car at the top of a ramp has more _________ energy and at the finish line at the bottom of the ramp it has more _________ energy.

• kinetic, potential

• kinetic, kinetic

• potential, kinetic

• potential, potential

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which graph represents the relationship between potential energy and height for an object in free fall?

• A) A linear graph with a positive slope

• B) A linear graph with a negative slope

• C) A parabolic graph opening upwards

• D) A parabolic graph opening downwards

In a roller coaster, at which point is the potential energy the highest?

• A) At the top of the first hill

• B) At the bottom of the first hill

• C) In the middle of the first hill

• D) At the end of the ride

Tags

NGSS.MS-PS3-2

Which of the following graphs best represents the conservation of mechanical energy in a closed system?

• A) A graph where kinetic energy increases as potential energy decreases

• B) A graph where both kinetic and potential energy increase

• C) A graph where both kinetic and potential energy decrease

• D) A graph where kinetic energy decreases as potential energy decreases