# Science

 What is the equation for work? work=force*distance You pull a sled through snow work no work work A machine is a device that makes work EASIER by: 1.amount of force exerted2.distance over which you exert the force3.the direction in which you exert it What is the SI unit for work? a.Newtons b.Pascal c.Joules Joules Mechanical Advantage: The number of time a machine multipies the input force. You hold a bag of groceries. work no work No work What formula is used to calculate power? Write the formula in TWO diffrent ways. Power=work/timePower=force*distance/time what direction MUST motion be in to do work? the SAME direction as the force Power: The rate at which work is done; the rate at which energy is consumed. You pull books out of ypur book bag work no work work you push a car stuck in the snow work no work no work you lift a bin of newspaper work no work work you hold a heavie piece of wood in place work no work no work Input Distance: distance through which the import force acts. Output Distance: Distance through which the output for acts. Pulley: a rope, chain or belt wrapped around a grooved wheel. types of pulleys: 1.fixed 2.movable 3.block and tackle 1. is attached to a struckture2. is attached to the object you are moving3. combines fixed and moveable pulleys Authordominique ID120684 Card SetScience Descriptionwork and mechanical avantages Updated2011-12-06T00:43:39Z Show Answers