Simple Machines 1
Simple machines make work _______.
easier
A doorstop is an example of which simple machine?
Wedge
True or False: An object must be moving in order to have energy.
False
True or false: the less force that is used, the quicker or easier an object will move.
False - the MORE force that is used
True or False: An object is always moving faster when it is accelerating.
False - acceleration is any change in speed, including going faster or slower.
Name or draw a real-life example of a wedge.
answers will vary
Name one real-life example of a pulley, or an object with a pulley.
curtains, yoyos, flagpoles, clotheslines, ceiling fan chains, rock climbing gear, escalators
Name a real-life example of an object with KINETIC energy.
answers will vary - any object in motion has kinetic energy.
A force is a ________ or a _________
push or a pull
What is the definition of "acceleration"?
any change in velocity; speeding up or slowing down
Name one real-life example of a lever.
handle bars, arms, elbows, pencil sharpeners, staplers, nail clippers, pliers, doors, etc.
Name one real-life example of an inclined plane.
Truck ramps, wheel-chair ramps, any ramps.
Slides, hills, funnel, garbage dumping trucks
Name a real-life example of an object with POTENTIAL energy.
answers will vary - any object that is about to move
You can tell an object has moved when its P_________ has changed.
Position
What is the definition of "mass"?
how much matter an object contains
Name or draw one real-life example of a screw.
curly fries, spiral stair cases, screws, bottle caps
Name all 6 simple machines
Wheel and Axle
Wedge
Pulley
Inclined Plane
Screw
Lever
What would have more POTENTIAL or stored energy before it fell? A book at the top of a bookshelf, or a book at the bottom of a bookshelf?
Book at the top of the shelf - has more potential energy because it has farther to fall.
Choose a simple machine and explain how it works.
Answers will vary
If an object in motion is gaining speed, it has _________ acceleration. If an object is slowing down, it has _________ acceleration.
Positive; negative
Name 3 simple machines that are in a bicycle.
lever, pulley, wheel and axle, screw
A device that is made up of more than one simple machine is called a ________ __________.
compound machine
What is the difference between potential and kinetic energy?
Potential = an object's stored energy
Kinetic = energy of an object in motion
It would be easier to stop the kindergartner because the kindergartner is smaller and has less mass and less force.
What is the difference between velocity and speed?
velocity is a speed with a given DIRECTION