Simple Machines

Front

Requirement for work to be done: Force is exerted, Object is carried, Force moves an object, Machine is used.

Back

Force moves an object.

Front

Calculate the work done when a painter lifts a can of paint weighing 48 Newtons a distance of 3 meters. (work = distance x force)

Back

48N × 3m

Front

Example of how a simple machine changes the direction of a force: using a rope to pull a box up a hill, using a rope and pulley to raise a flag, using a slide to push a box down steps, using an axle and wheel to make a wagon move forward.

Back

using a rope and pulley to raise a flag

Front

What causes the efficiency of a machine to be less than 100%? Options: friction, gravity, input force, reaction force

Back

friction

Front

Which is a simple machine? Options: baseball bat, bicycle, can opener, car

Back

baseball bat

Front

Which of the following is a form of the inclined plane? Options: pulley, screw, wheel and axle, lever

Back

screw

Front

Which simple machine would most likely increase the distance and reduce the force needed for a rolling cart to be moved up three steps? Options: lever, screw, pulley, inclined plane

Back

inclined plane

Front

The mechanical advantage available from a pulley could best help in which situation? Options: pushing a car, rotating a wheel, flying an airplane, lifting an elevator

Back

lifting an elevator

Front

Which statement correctly explains a compound machine?

Back

A compound machine is made up of two or more simple machines.

Front

The greatest amount of force is required to move the metal block up which inclined plane? Options: A, B, C, D

Back

C