energy
this kind of energy comes from things like the sun or a lamp
LIGHT energy
an object cannot move unless a ________ moves it
FORCE
forces can be described as:
pushes and pulls
True or false: work is done when a force moves something
TRUE
True or False: simple machines make work harder
FALSE - simple machines make work easier
this kind of energy comes from a speaker or musical instrument
SOUND energy
an object moves in the ______ direction as the force that moves it
A) same
B) opposite
C) different
A) SAME
in order to make an object go faster, slower, or change direction, what is needed?
FORCE
what is something that can store energy?
food, fuel, batteries...
Name 3 categories of things that do work
Wind, moving water, people, animals, machines
this kind of energy comes from plugging things into outlets
ELECTRICAL energy
motion can be described by what 3 things:
direction sound
speed color
distance
direction, distance, speed
What is an example of an invisible force?
False: energy does change from 1 form to another, just like when you eat a donut and then it changes from chemical energy in your body to mechanical energy as you bounce off the walls from a sugar rush!
What is a simple machine that you could use to lift a bucket up to a treehouse?
Pulley
this kind of energy comes from machines and movement
MECHANICAL energy
_______ is done when a force moves something
A) motion
B) energy
C) work
C) WORK
if you want to throw a ball to the trampoline but your hand with the ball is pointing to the garage, will the ball go toward the trampoline?
no, the ball will move in the direction it is thrown, so it will move toward the garage
The ability to do work is called _________.
A) energy
B) electricity
C) effort
A) energy
What is a simple machine you'd find on a bicycle?
wheel and axle, lever in hand break
this kind of energy comes from reactions of elements, like batteries, gasoline, and experiments like baking soda and vinegar
CHEMICAL energy
Work is measured by multiplying the amont of FORCE by the __________ an object moved
A) direction
B) distance
C) energy
B) Distance
The amount of force gravity has on an object:
A) friction
B) weight
C) gravity
B) weight
Give an example of mechanical energy
riding a bike as you move the pedals
coasting down a hill on your bike
anything done by most machines when an object moves
A shovel or see-saw is what kind of simple machine?
lever