Work and Simple Machines Test Review

Front

What instrument would be used to measure the FORCE that is applied to lift something?

Back

spring scale

Front

The unit for force is ___.

Back

Newtons

Front

___ measures how well a machine converts input energy, work, and power into output energy, work, and power.

Back

efficiency

Front

The name of the fixed point that a lever is free to move around is called a ___.

Back

fulcrum

Front

Door knobs and steering wheels are examples of ___.

Back

wheel and axles

Front

An important way to improve the efficiency of a machine is to __ the amount of friction.

Back

decrease

Front

A ___ is a device that helps reduce the amount of force required to do work.

Back

simple machine

Front

When work has been done, there is evidence of ___ used.

Back

force

Front

If a man is pushing a cart across the road, is there work being done?

Back

yes

Front

A couch is pushed with a horizontal force of 80N and moves a distance of 5m across the floor. How much work is being done?

Back

400J