GrA quiz on Levers

Levers & Moral Values – Quiz

Group A · Click an option for each question, then press Submit to see your score.

Topic: Levers (Classes & MA) Values: Balance · Teamwork · Effort Total: 10 MCQs

Q1

Which statement defines Mechanical Advantage (MA) of a lever?

Ratio of effort arm to effort. Ratio of load to effort (or effort arm to load arm). Correct: MA = Load/Effort. Sum of effort and load. Difference between load and effort.

Q2

In a Class I lever, MA can be >1, =1 or <1. Which setup gives MA > 1?

Effort arm shorter than load arm. Effort arm equal to load arm. Effort arm longer than load arm. Longer effort arm → force multiplier. Depends only on object mass.

Q3

Class II lever (e.g., wheelbarrow) always has MA > 1 because:

Load is between fulcrum and effort. This gives longer effort arm. Effort is between fulcrum and load. Fulcrum is between load and effort. It changes direction only.

Q4

A Class III lever (e.g., broom) is used mainly to:

Multiply force (MA > 1). Balance equal forces (MA = 1). Change direction only. Gain speed and range of movement (MA < 1). Effort in middle → speed advantage.

Q5

If a lever has effort arm = 40 cm and load arm = 10 cm, the MA is:

1 2 4 MA = Effort arm / Load arm = 40/10. 0.25

Q6 (Value)

Which moral best matches a Class II lever (less effort to lift heavy load)?

“Do everything alone.” “Teamwork reduces burden.” Like a wheelbarrow shares the load. “Speed matters more than safety.” “Ignore balance in life.”

Q7 (Value)

A seesaw works well only when balanced. What value does it teach?

Balance your study and play. Fulcrum balance ↔ life balance. Always choose the heavier side. Effort is not important. Never take help.

Q8

Which is a correct Class I lever example?

Wheelbarrow Nutcracker Broom Scissors Fulcrum (pivot) in the middle.

Q9

For a bottle opener, the load arm = 2 cm and the effort arm = 8 cm. What is MA?

4 MA = 8/2 = 4 (Class II lever). 0.25 2 1

Q10 (Value)

A Class III lever needs more effort but gives speed. Which value fits best?

Avoid effort at any cost. Let others do your work. Hard work builds skill and reach. Like a broom or fishing rod. Never try new methods.

Tip: You can change answers any time before you click Submit.