Simple Machines
True of False: A simple machine is a machine with few or no moving parts. Machines make work easier.
True
True or false: forces can only be "pushes" that move an object.
False. A force is a push or pull that acts on a load. Forces can start or stop a movement.
Name something that twists or turns.
doorknob, wringing out a towel, etc
A door stop is an example of what type of simple machine?
Wedge
Is throwing a baseball an example of a push or a pull force?
Push because the baseball is moving away from you.
Swing, Roll
Name 3 examples of a where ramps or incline planes may be used.
Answers will vary (ramp to a building/sidewalk, ramp to load trailer or moving truck, ladder is an inclined plane).
Name 3 examples of friction?
Rubbing your hands together, stopping in skate, pulling on the brakes when riding a bicycle, etc.
Name an activity where you might glide
skating, rollerblading, sky gliding
Describe a wheel and axle.
A wheel and axle is a simple machine that an axle (which is a rod) goes through the centre of a wheel.
Describe how static electricity can move things away from, or towards a charged object.
Static electricity creates a charge. This charge can attract opposite charges in another object, attracting it to the charged object, or repel like charges in the other object, repelling (moving away) from the charged object.
What type of simple machine is found on a tractor? What motions does a tractor do?
Roll, turn, etc.