แผ่นงานBill Nye: Simple Machines
คำถามทั้งหมด: 1
แป้นคำตอบBill Nye: Simple Machines
คำถามทั้งหมด: 1
Pulley
Change the size and direction of forces
The middle part that allows one end to go down and the other to go up
Lever
Two ends and a fulcrum
Pulley
Allow the rider to put out less effort for a longer distance
Lifting things easier by walking a longer distance
A ramp wrapped around a stick
Acts as an arm or leg for someone who needs it
Ramp
Makes things easier to lift by spreading the work
To change the speed and effort needed for different terrains
Lever
To lift or hold materials together
