Energy,Motion, and Force
what is kinetic energy?
Kinetic energy is the energy of moving stuff!
What does mechanical advantage help us do?
Mechanical advantage helps us do hard things easier
What do simple machines do?
simple machines help lift, move, or change direction of force.
What do chain reactions do?
Chain reactions are like when one thing makes another thing happen, and then that thing makes another thing happen
What is potential energy
Potential energy is the energy something has when it’s waiting to do something!
Seesaws are fun...and use levers to work... They are a form of simple machines that use mechanical advantage...True or False?
True!
You can move something heavy up high by using this flat, slanted thing.
A Ramp
What type of reaction happens when you knock over a bunch of lined up dominoes?
Chain Reaction
In order for a chain reaction to work you need what 3 things?
Energy, Force, and Motion
True or false: Tools that ue mechanical advantage give us more muscles.
False... they help our muscles work better
You turn this simple machine to lift something up, used for elevators
Which is considered a chain reaction?
A. You sneeze, and it scares the dog, who bumps the table, which makes your juice spill.
B. You pop a balloon and it scares your cat, who jumps and knocks over a plant
C. You knock over a row of blocks and they all fall down
D. All of the above
D. All of the above
When something moves in a chain reaction it is using what?
Motion
This long bar helps lift a heavy rock when you push one side.
lever
This long stick helps you lift heavy things when you press down on one side. (Hint... A seesaw)
A lever
In a chain reaction when you are holding a marble at the top of a ramp waiting to let go to knock over a row of dominoes is this potential or kinetic energy?
Potential
Which of the following uses potential energy?
A. When you're running
B. If you're sitting at the top of a slide, you're full of this energy, just waiting to go!
C. When a car is zooming down a ramp
B. If you're sitting at the top of a slide, you're full of this energy, just waiting to go!
True or False...Mechanical advantage means we use less effort to do a job.
True!
Force is measured by....
A. Length
B. Newtons
C. Weight
B Newtons
In a chain reaction when you let go of a marble at the top of a ramp and it knocks over a row of dominoes is this potential or kinetic energy?
Kinetic energy