امتحانScienceصف سادس شهر فبراير

all the following levers don’t save effort except

when the length of the force arm equals 2.5 meter and the length of resistance arm equals 1 meter so

resistance force measured in ……

Which of the following levers has the arm of force longer than the resistance arm?….

law of levers states that ….

when the arm of force =10 cm and the arm of resistance = 10 cm , so……

…… is a lever that used small force to make great effort

The lever that has a fulcrum between effort and resistance is called …. Class lever

wheelbarrow is considered from … class lever

…….. third class lever

……. Is a rigid bar that rotates around fixed point and affected by two forces

all the following are from the importance of levers except …….

the ………. Force resulted from the weight of the person

all levers consist of ……

levers were first described in 260 B.C by …

the fulcrum of levers is always between force and resistance

Soda water opener is a second class while fishing tool is first class lever

from the function of levers increasing the speed

levers make tasks easier

water pump is a kind of levers which pick up small objects