exam review

In order for work to happen, what 2 things must occur?

• Mass and Displacement

• Force and Mass

• Force and Work

• Force and displacement

Force is measured in....

• Kilograms

• m/s

• Newtowns

• Joules

What is happening to the gravitational potential energy as the car travel up the hill?

• increasing

• decreasing

• staying the same

Which type of springs have low spring constants (K)?

• Stiff springs

• weak springs

What does the K represent in this equation?

• the potential energy of the spring

• the deformation of the spring

• the material the spring is made of

• the spring constant

Elastic Potential Energy is _________________.

• the ability of a material to return to its original shape after it has been stretched or deformed.

• potential energy that is stored due to the deformation of an elastic object, such as a stretched spring

• energy stored in the bonds of chemical compounds. chemical energy is released during chemical reactions.

• the energy contained within a system that is responsible for its temperature.

• the flow of thermal energy

The spring constant of an object tells you?

• what type of spring you are dealing with

• how long the spring will stretch or compress

• it gives you a value on how easy or hard it is to change the object's length.

• A spring constant gives you a number which tells you what material the spring is made of.

A crate is slid to the right across a cement floor. in the situation, the force of friction would act in what direction?

• To the right (same direction as the motion.)

• To the left (opposite of the motion.)

• There is no friction present.

When one form of energy changes into another form of energy

• energy transfer

• energy motion

• energy transformation

• open system

In all energy transformations, some energy is "lost" as what?

• Kinetic energy

• Potential energy

• mechanical energy

• thermal energy