Machines
Energy
Math Problems
Energy Transformations
Random
100
A device that does work with only one movement and changes the size or direction of a force is a ___________ ______________.
Simple Machine
100
Energy is measured in ___________.
Joules
100
The unit of power is the _______.
Watt
100
Anything that can fall has stored energy called _________ _____________ ______________.
gravitational potential energy
100
Who won the Royals vs. Blue Jays baseball game last night?
Royals
200
When 2 or more simple machines work together, they are called a ______________ ________________.
Compound Machine
200
The equation for gravitational potential energy is ________.
m x g x h
200
A baseball with a mass of .20 kg is moving at a speed of 60 m/s. What is the baseball's kinetic energy from this motion?
360 J
200
Energy stored in chemical bonds is called _________ ___________ __________.
chemical potential energy
200
Who won the Mets vs. Cubs baseball game last night?
Mets
300
Machines make tasks easier by changing the direction of the ______________ needed.
force
300
__________ energy is energy of motion.
Kinetic
300
An 4.0 kg book is placed on a 2 m high desk. How large is the gravitational potential energy of the book-Earth system relative to the floor?
78.4 J
300
Mechanical energy is the total kinetic and _________ energies in a system.
potential
300
Who won the Arsenal vs. Bayern Munich soccer match last night?
Arsenal
400
Which is not a simple machine? Pulley, Bicycle, or Ramp
Bicycle
400
A bus transfers chemical potential energy into __________ so that the bus moves.
Kinetic energy
400
Find the efficiency of a machine that does 600 J of work if the input work is 3,000 J.
20 Percent
400
The _________ is a unit by nutritionists to measure how much energy you get from various foods.
calorie
400
When solving for efficiency your answer is written in a ______________.
Percentage
500
The amount by which a machine multiplies an effort force is called the ___________ _____________.
Mechanical advantage
500
________ ________ energy is stored in a stretched rubber band.
Elastic potential
500
Calculate the mechanical advantage of a hammer if the input force is 275 N and the output force is 3,000 N.
10.9
500
The mechanical energy of a coconut falling from a tree _______ __________.
Remains constant
500
Who won the OKC Thunder game last night?
Thunder
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