Simple
Machines
Machines
The spot where a lever turns
Fulcrum
A fixed unmoving object or location
a reference point
The resistance to a change in motion is called
Inertia
_____ occurs whenever an object speeds up, slows down, or changes direction.
Acceleration
Force is measured in
Newtons
Combines two or more machines to make work easier
Compound Machine
The change of an object's position
Motion
What is the force that works against inertia and keeps objects from moving against other objects?
Friction
Henry usually runs about 7.5 mi/hr
Speed
Which unit is used to measure work?
Joule
What is the decrease in effort that is needed to move an object called?
Mechanical Advantage
Energy an object has because of its motion
Kinetic
A rocket is launched, expelling gases downward to the ground, causing the rocket to move upward. Which Law of Motion is in action?!
Third
On the day of the race, Henry ran along the track toward the east at 7.5 mi/hr
Velocity
Which simple machine does an axe blade use?
Wedge
Which machine is an inclined plane wound around a cylinder or cone?
Screw
The ability to make something move
Mechanical Energy
You are sledding and the sled stops when it hits a branch hidden in the snow. You keep moving and slide off the sled. Which Law of Motion is in action?!
First
The runner at the front of the race suddenly stumbled over a piece of gravel. His speed slowed.
Acceleration
Which simple machine does a doorknob use?
Wheel and axle
Which simple machine makes work easier by either changing the direction of the force or by reducing the amount of force needed to move an object?
Pulley
The _______ of an object is determined by its mass and velocity
momentum
It took one student to pick up a box filled with feathers and two students to pick up the same-sized box filled with books. Which Law of Motion is in action?!
Second
What force works against the effort force?
Resistance force
Which simple machine does a jar lid use?
Screw