law of lever part (1)

the law of levers states that....

• force arm X its arem = resistance X its arm

• force arm /its arem = resistance / its arm

• force arm + its arem = resistance + its arm

• force arm - its arem = resistance - its arm

the distance of effort force and resistance in the liver depends on .....

• the arm of the force

• the arm of resistance

• the position of fulcurm

• no correct answer

the distance between the effort force and fulcrum is .......

• the effort force

• the effort arm

• the resistance force

• the resistance arm

when the arm of force is longer than the arm of resistance, the effort force ..........the resistance

• longer than

• smaller than

• equal to

• double

when the arm of force ........ the arm of resistance, the effort force equals the resistance force

• larger

• smaller

• equal

• double

when the arm of the force equals 4 cm , and the arm of resistance equals 4 cm , so .........

• the effort force = the resistance force

• the effort force > the resistance force

• the effort force <the resistance force

• the effort force + the resistance force

when the effort force is ...... the resistance force, so this lever doesn`t conserve effort.

• equal

• larger than

• all answers

when the force arm is equal to the resistance arm, the lever conserves effort.

• true

• false

when the resistance arm is shorter than the effort arm,the lever doesn`t conserve effort

• false

• true

if the arm of force is shorter than the arm of resistance, the lever conserves effort.

• false

• true