Work, Power, Simple Machines

Front

Where should the fulcrum be placed in order for the student to use the least amount of effort possible?

Back

closer to the load

Front

The correct unit to measure power is..

Back

Watt

Front

In which case is work being done: a student sleeps, a student carries his chair across the room, a student pushes a locked door that doesn't move, a student picks up his chair

Back

a student picks up his chair

Front

If you use a crowbar to get a lid off a bucket, which simple machine are you using?

Back

lever

Front

What type of simple machine is found on the lid of a pickle jar?

Back

screw

Front

A flagpole or blinds on a window would be an example of which simple machine?

Back

pulley

Front

Calculate the amount of work done if you use 100 Newtons of force to push a box 5 meters across the kitchen floor.

Back

500 J

Front

The rate at which work is done is

Back

power

Front

Which of these simple machines changes the direction of your force: wedge, fixed pulley, inclined plane, wheel and axle?

Back

fixed pulley

Front

Why can no machine be 100% efficient?

Back

friction