Card Set Information
work and mechanical avantages
What is the
You pull a sled through snow
A machine is a device that makes work
1.amount of force exerted
2.distance over which you exert the force
3.the direction in which you exert it
What is the SI unit for work?
The number of time a machine multipies the input force.
You hold a bag of groceries.
What formula is used to calculate power? Write the formula in
motion be in to do work?
direction as the force
The rate at which work is done; the rate at which energy is consumed.
You pull books out of ypur book bag
you push a car stuck in the snow
you lift a bin of newspaper
you hold a heavie piece of wood in place
distance through which the import force acts.
Distance through which the output for acts.
a rope, chain or belt wrapped around a grooved wheel.
types of pulleys:
3.block and tackle
1. is attached to a struckture
2. is attached to the object you are moving
3. combines fixed and moveable pulleys