screw
friction
friction
decrease
friction AND gravity
an object made of 2 or more simple machines
wedge
add wheels, smooth surfaces, oil/wax, lighten it
force
pulley
the empty box
gravity
push
wedge
lever
pull
wedge
wheel and axle
lever, inclined plane, pulley
greater force
start moving, stop moving, change direction, change speed
gravity
gravity
simple machine
changes the direction
What force brings an object close to you?
the push or pull of an object that causes it to move
bottle cap
Name a way to lessen the friction of a heavy box.
To move a heavier object, you must apply a _______ force
a force that slows or stops movement between 2 surfaces
Which simple machine is used to split or cut objects?
Does a simple machine increase or decrease the amount of force needed to move an object?
Which force makes it possible for you to walk? Think carefully!!
an object that makes work easier
What force moves an object away?
Simple machines increase the distance of a force and what else?
doorknob
A v-shaped simple machine made up of 2 inclined planes
Several simple machines can help you lift heavy object. What are they?
What causes a box to move slower on carpet than on hardwood floors?
a force that pulls an object towards another object
What is a compound machine?
Rivers flowing downhill is an example of what?
knife
Two boxes are pushed with the same amount of force. One is empty and the other has books in it. Which one will travel the farthest?
Flagpole
crowbar
Name 2 ways a force can change an object's movement?
When you drop a ball, what is the force that pulls it towards the ground called?
