Motion
The change of an object's position is known as...
motion
Which law is known as the "action and reaction" law?
The Third Law of Motion
Which machine is a bar that turns on a point?
Lever
Which machine is an inclined plane wound around a cylinder or cone?
screw
Which unit is used to measure work?
A. Newton
B. Cubic centimeter
C. Mile
D. Joule
D. Joule
An object or location that is fixed and unmoving is called a what?
reference point
This law says that an object at rest stays at rest and an object in motion stays in motion.
What is the first law?
Which machine consists of two inclined planes placed back to back?
wedge
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?
What is the formula to determine force?
force = mass X acceleration
The resistance to a change in motion is called...
inertia
Which law explains how it took one student to pick up a box filled with feathers and two students to pick up the same-size box filled with books.
The Second law of motion
An axe blade is an example of which simple machine?
wedge
A jar lid is an example of which simple machine?
screw
What is the decrease in effort that is needed to move an object called?
Mechanical advantage
What term means the ability to make something move?
mechanical energy
A rocket is launched, expelling gas downward to the ground causing the rocket to move upward. Which law explains what is happening here?
The third law of motion
Give two examples of an inclined plane (NOT WEDGE OR SCREW).
slide, ramp, roof, hill, roof, etc.
Give three examples of a wheel and axel.
bike tires, bike gears, turbine on wind mill etc.
Is this an example of acceleration, distance, speed or velocity?
Henry usually runs about 7.5 mph
Speed
In what way does friction affect motion?
Friction is a force that keeps objects from moving against other objects. Friction works against inertia and helps us to walk.
What effect does gravity work against inertia?
Gravity keeps an object from moving indefinitely in a straight line
Give an example of a COMPOUND MACHINE, and explain what two or more simple machines it is using together?
scissors - lever and wedge
wheel barrow- lever, wheel and axle
escalator - pulleys and inclined plane
Your mom bought a new dishwasher, and your uncle is bringing it to your house with his pickup truck. To put it in place, he will need to bring it up the back steps and through the utility room to the kitchen. What simple machines might he use to move the dishwasher into the kitchen with less effort?
An inclined plane (a ramp); pulleys arranged as a block and tackle; an appliance dolly as a second-class lever with a wheel and axle and a wedge (the bottom plate)
The runner at the front of the race suddenly stumbled over a piece of gravel and his speed slowed.
Is this an example of acceleration, distance, speed or velocity?
Acceleration