Motion
Fill in the blank: A change in position is __________.
motion
force
What force holds the moon in its orbit around Earth?
gravity
What term describes the use of force to move an object over a distance?
work
What is a wheel with a line of rope, cord, or chain around it called?
a pulley
What do we call the measure of an object's change in position over a period of time.
speed
Fill in the blank: A change in velocity is _______________.
acceleration
Do you weigh more on Earth or the moon?
Earth
Fill in the blank: A _________ machine is a machine with few or no moving parts that you apply just one force to.
simple
Fill in the blanks: A wheel and axle can work in two ways. You can turn the _______ to make the axle move. Or you can turn the ______ to make the wheel move.
wheel, axle
What do we call the location of an object?
position
What force did we feel when we rubbed our hands quickly together?
friction
Fill in the blank: Gravity is the force of __________ that exists between any two masses anywhere in the universe.
attraction
What is a fulcrum?
The fixed point on a lever.
What is a real life example of a pulley?
flag pole, window blinds
What is the formula for speed?
speed=distance divided by time
Name a real life example of reducing friction.
A surfer waxing his board, putting lotion on your hands, a swimmer wearing a swim cap
Fill in the blank: The measurement of the gravity acting on an object is the object's __________.
weight
Give a real life example of a lever?
See-saw, broom, pry bar, wheelbarrow
Give a real life example of a wheel and axle simple machine?
salad spinner, faucet
What is the speed of a dog that runs 9 meters in 3 seconds? Make sure to include units!
3 m/s
Will a semitruck or a Prius accelerate down a hill faster?
a semitruck
When you diet are you trying to lose weight or mass and why?
Mass; because weight is based on gravity and mass is based on how much of you there is.
Fill in the blank: A paper cutter consists of a lever and a ________ working together.
wedge
What do you call a simple machine on a slanted surface?
inclined plane