Vocab
__________ is the ability to do work or to cause changes in matter.
Energy
Which of these has kinetic energy?
a. a book sitting on a shelf
b. hat and gloves on a table
c. cars parked in a parking lot
d. a child kicking a soccer ball
d. a child kicking a soccer ball
True or False: An object does not need to be moving to have the ability to do work.
True
Which of these has elastic potential energy?
a. vase sitting on a shelf
b. a stretched rubber band
c. a child moving down a slide
d. sugars stored in the molecules of food
B. a stretched rubber band
The energy in a flashlight is provided by the electromagnetic/chemical energy from the batteries.
Chemical
A _________ is a group of interacting parts that move or work together.
System
An object may/may not have both kinetic energy and gravitational potential energy at the same time.
May
A trampoline has _______ potential energy.
Elastic
Which of these best illustrates chemical potential energy?
a. a dog playing fetch
b. gasoline in a gas tank
c. water moving down a hill
d. a skydiver about to jump out of a plane
B. gasoline in a gas tank
After a tennis ball hits the racket the strings rebound and the racket transfers/transforms kinetic energy back to the tennis ball.
Transfers
What is defined as the transfer of energy to an object by a force that causes the object to move in the direction of that force?
Work
Which of these has the most kinetic energy?
a. a 25 kg fish tank sitting on a table
b. a 50 g fish swimming in a fish tank
c. a 7,500 kg car parked on a steep hill
d. a 50 kg boulder suspended from a cliff.
B. a 50 g fish swimming in a fish tank
_______ potential energy is the energy an object has due to its position relative to Earth.
Gravitational
Cereal and orange juice have stored thermal/chemical energy.
chemical
Which has more kinetic energy; a student riding a bike, or a moving car?
The moving car because it has a lot more mass and is moving faster.
A ________ is any region in which a non-contact force has an affect.
True or False: The kinetic energy of an object is directly proportional to its mass and proportional to the square of its velocity?
True
When a cart on a roller coaster moves down the hill potential energy is transferred/transformed.
Transformed in kinetic energy
________ Energy is the total kinetic energy of all the particles that makeup an object.
Thermal
What is work measured in?
Joules
The energy of motion is called ____________. an object may also have stored energy based on its relative position within a system or its condition, known as _______.
Kinetic energy, potential energy
Which change would increase the kinetic energy the most?
a. reducing the mass by half
b. reducing the speed by half
c. doubling the mass of the object
d. doubling the speed of the object.
D. doubling the speed of the object.
Which distance between two magnets in a magnetic field would produce the largest potential energy?
a. 5 cm
b. 10 cm
c. 15 cm
d. 20 cm
a. 5 cm
_________ Energy is the kinetic energy of moving electric charges.
Electrical
What is the equation for work?
Work = Force (Newtons) x Distance