force and motion/simple maching

What is a force that results when you rub two materials together and may cause the object to slow down

• friction

• velocity

• acceleration

• motion

What is motion?

• It is like the ocean

• Motion is like acting

• Any change in an object or person's position

What pulls a ball back to earth?

• friction

• gravity

• molecules

• gas

The tendency of an object at rest to stay at rest unless it acted upon by force is

• inertia

• gravity

• force

• power

What is the average speed? If average speech = Distance/Time

10m Time: 5s

• 100 m/s

• 1/2 m/s

• 50 m/s

• 2 m/s

the unit of measure for work is

• meters

• newtons

• joules

• millibars

How much work was done when a force of 12 newtons was applied to an object and the object moved 2 meters?

Work=Force x Distance

• 14 Joules

• 14 Newtons

• 24 Joules

• 24 Newtons

an ax is a simple machine called a wedge.How can you make the cutting edge mor efficient

• make it longer

• make it sharper

• make it shorter

• make it more rounded

which simple machines are a sloping surface

• pulleys

• levers

• inclined planes

• wheel and axel

a lever roates on a fixed point called a

• screw

• ramp

• wheel

• fulcrum