PRACTICE - POTENTIAL ENERGY

What is a noncontact force?

• A force that requires two objects to touch each other

• A force that one object can apply to another object without touching it

• A force that only occurs in outer space

• A force that can only be seen with a microscope

Which of the following is an example of a gravitational noncontact force?

• Rubbing a balloon on your hair

• A magnet moving a paperclip

• A pencil dropping to the ground

• Boiling water in a pot

What type of noncontact force is demonstrated when a magnet moves a paperclip?

Which example illustrates an electric-static noncontact force?

• A pencil falling off a desk

• A paperclip sticking to a magnet

• Rubbing a balloon on your hair

• The moon orbiting the Earth

What is kinetic energy?

• The energy stored in an object at rest

• The energy due to an object's motion

• The energy released during a chemical reaction

• The energy absorbed during a phase change

How does the mass of an object affect its kinetic energy?

• The more mass an object has, the less kinetic energy it has

• The mass of an object does not affect its kinetic energy

• The more mass an object has, the more potential energy it has

• The more mass an object has, the more kinetic energy it has

What is the relationship between kinetic energy and the speed of an object?

• The more kinetic energy an object has, the less speed it has

• The more kinetic energy an object has, the more speed it has

• The speed of an object does not affect its kinetic energy

• The more speed an object has, the less kinetic energy it has

What is gravity?

• The amount of matter in an object

• A unit of measurement

• An attractive force that exists between all objects that have mass

• The gravitational force exerted on an object

What is mass?

• The gravitational force exerted on an object

• The pull between an object and the earth

• The amount of matter in an object

• A unit of force

What is weight?

• The amount of matter in an object

• The pull between an object and the earth

• A unit of force

• The gravitational force exerted on an object