Quiz on Levers GrB

Levers Quiz

Concepts • Numericals • Moral Values — Select your answers, then click Submit.

Total: 10 MCQs Covers: Classes • MA • Values Feedback shown after submit

Q1

The point about which a lever turns is called the:

Load Fulcrum Pivot/support of rotation. Effort Moment

Q2

In a Class I lever, the correct order is:

Effort – Load – Fulcrum Load – Effort – Fulcrum Effort – Fulcrum –effort Load – Fulcrum – Effort Fulcrum lies between load & effort.

Q3

A lever has effort arm = 45 cm and load arm = 15 cm. What is MA?

1 2 3 MA = Effort arm / Load arm = 45/15. 0.33

Q4

If Load = 60 N and Effort = 20 N, then MA = ?

3 MA = Load / Effort = 60/20. 0.33 30 20

Q5

Which lever class always has MA > 1 (force multiplier)?

Class I Class II Load is between fulcrum and effort. Class III None

Q6

A Class III lever (e.g., broom, fishing rod) mainly provides:

Only direction change Force multiplication No advantage Speed and range of movement MA < 1: movement multiplier.

Q7

For a Class I lever with equal effort and load arms (30 cm each), MA is:

2 1 Equal arms → MA = 1 (changes direction). 0.5 3

Q8 (Value)

A wheelbarrow lets one person move heavy loads. Best value?

Teamwork and sharing reduce burden Like a force multiplier in life. Everyone must work alone Ignore help Only strength matters

Q9

A bottle opener (Class II) lifts a 80 N cap with MA = 4. Required effort is:

40 N 16 N 20 N Effort = Load / MA = 80/4. 4 N

Q10 (Value)

A balanced seesaw reminds us to:

Compete without rules Choose only heavy tasks Avoid rest Balance study, play, and rest Balance = safety & fairness.

Tip: You can change answers any time before clicking Submit.