Web & Social Media Analytics Previous Year Question Paper.pdf
Simple machines
1. ENERGY CHANGES
Person arm
(biochemical energy)
Axe
Scissors
Lever
Sailboat
(wind energy)
Car, Aeroplane...
with an engine.
(chemical energy)
movement
(kinetic energy)
movement
(kinetic energy)
movement
(kinetic energy)
MACHINES NEED __________TO WORK.
2. A machine is one or more pieces that can transform
one energy to another. They can also transform
energy into work or to use forces to produce an effect
on a body.
ACTIVITAT: Think about some forces that
produce these effects:
-change the shape.
-movement.
-stop a movement.
MACHINES
3. SIMPLE MACHINES
Examples of simple
machines:
Lever
Inclined plane
Wedge
Screw
Wheel and axle
Pulley
https://www.dkfindout.com/uk/science/simple-machines/
https://www.youtube.com/watch?v=fvOmaf2GfCY
9. ACTIVITAT: Which class are these levers?
First class Second class Third
class
NUTCRACKER
TWEEZERS
SEESAW
SCALE
WHEELBARROW
SCISSORS
STAPLER
HAMMER
10. Inclined plane
• Ramps use slopes to make forces bigger or
smaller. Ramps turn a difficult lifting job into
an easy one by spreading out the lift over a
distance, so it requires less force.
11. LABORATORY: Built different inclined planes like the
ones in the picture. Raise an object vertically and then do it
with a ramp (inclined plane), with two different inclinations.
Measure the force that you have to make to lift the object
with a dynamometer.
