lesson 3: how are work and motion related?. work – the result of a force moving an object
TRANSCRIPT
Lesson 3: How are work and Motion related?
When you push or pull something and it moves you have done work.
Lesson 3: How are work and Motion related?
If you push or pull on something and it does not move you have not done work.
Lesson 3: How are work and Motion related?
Simple Machine – a machine made of one or two parts.
Simple Machines make work easier.
Types of Simple Machines
LeverA stiff bar that rests on a support called a fulcrum which lifts or moves loads. (the longer your lever the easier the lift)
Types of Simple Machines
Pulley A simple machine that uses a rope and a wheel to move an object. (The more pulleys, the longer the rope, the easier it is to pull)
Lesson 3: How are work and Motion related?
Compound Machine - a machine made of two or more simple machine.