Unit 8. Energy Transformations

At what position does the pendulum have the greatest gravitational potential energy?

• Position D
• Position C
• Position B

What is energy?

• moving energy

• stored energy

• renewable energy

• The ability to do work.

What is potential energy?

• moving energy

• stored energy

• renewable energy

• non renewable energy

What is kinetic energy?

• moving energy

• potential energy

• stored energy

• renewable energy

WHICH OF THE FOLLOWING IS NOT AN EXAMPLE OF POTENTIAL ENERGY?

• A BALL TRAVELING AT 10 M/S
• A COMPRESSED SPRING
• WATER BEING STORED AT A WATER DAM
• A STRETCHED RUBBER BAND

YOUR BODY OBTAINS ENERGY FROM THE FOOD YOU EAT. WHAT IS THE FORM OF ENERGY IN FOOD?

• KINETIC
• ELASTIC
• GRAVITATIONAL
• CHEMICAL

GRAVITATIONAL POTENTIAL ENERGY DEPENDS ON

• MASS AND VELOCITY

• MASS AND WEIGHT

• MASS AND HEIGHT

• HEIGHT AND DISTANCE

WHICH OF THESE DESCRIBES THE LAW OF CONSERVATION OF ENERGY?

• NO MACHINE IS 100% EFFICIENT
• ENERGY IS NEITHER CREATED OR DESTROYED
• THE ENERGY RESOURCES OF EARTH ARE LIMITED
• THE ENERGY OF A SYSTEM IS ALWAYS DECREASING

AS A ROLLER COASTER MOVES DOWN A HILL, POTENTIAL ENERGY IS CONVERTED INTO KINETIC ENERGY, THERMAL ENERGY, AND SOUND ENERGY. WHAT IS TRUE ABOUT THE TOTAL ENERGY OF THIS SYSTEM?

• ENERGY IS GAINED (CREATED) AS THE ROLLER COASTER MOVES
• ENERGY IS LOST (DESTROYED) AS THE ROLLER COASTER MOVES
• THE TOTAL ENERGY REMAINS THE SAME AS THE ROLLER COASTER MOVES
• THE TOTAL ENERGY CONSTANTLY CHANGES AS THE ROLLER COASTER MOVES

Four balls are thrown at the same velocity, with different masses. Which ball has the most kinetic energy?

• The 20g ball

• The 50g ball

• The 24g ball

• The 40g ball