Energy 24

Energy is defined as:

What is the best reason for why the work done by a spring is hard to find?

• Different springs have different stiffnesses.

• Springs exert forces that change as the spring is stretched.

• Not all springs are elastic.

• Hooke's Law does not apply to springs.

In the equation, W = ΔE, the symbol "Δ" is best interpreted as:

In a system of two blocks, block 1 does work on block 2. Which block loses energy in this interaction?

• Both Blocks

• Neither Block

• Block 1

• Block 2

How much kinetic energy does a 4.4kg bowling ball have, 2.0 seconds after beginning free fall? Assume g = 10m/s/s and express the answer with two significant digits.

The fact that the work done by the net force on an object equals the kinetic energy transferred to that object is called the:

If work is being done by an object's weight, the type of energy the object receives is:

What symbol is used for the constant of proportionality in Hooke's Law?

The fact that the amount of GPE that a book on a shelf has is independent of how it got there is known as:

Define kinetic energy.