Semester CBA Test Corrections

Front

What is the net force when you push a couch with 20 N to the right and your friend pushes with 25 N to the right?

Back

45 N to the right

Front

At which point is potential energy greatest?

Back

Point W

Front

What is the reaction force when an archer shoots an arrow?

Back

The arrow's push against the bowstring

Front

What shows an energy transformation from chemical energy to electrical to light energy?

Back

A battery causes a flashlight to shine.

Front

What provides evidence of a chemical change?

Back

Wood is burned releasing ash and smoke.

Front

What is potential energy?

Back

Energy stored in an object due to its position or state.

Front

What is kinetic energy?

Back

Energy an object possesses due to its motion.

Front

What is the law of conservation of energy?

Back

Energy cannot be created or destroyed, only transformed.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

What is an example of an energy transformation?

Back

A candle burning transforms chemical energy into light and heat.