Mechanical Advantage in Action — Flashcards
Kerala Board · Class 10 · Physics
20 flashcards for Mechanical Advantage in Action (Kerala Board Class 10 Physics) to test yourself on key terms and facts.
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What are simple machines? Give their main advantages.
Answer
Simple machines are devices that change the magnitude of the effect of force or the direction of the force or both. Main advantages: 1) Changes the magnitude of the effect of force 2) Changes the dire…
Define effort, load, and mechanical advantage. Write the formula for mechanical advantage.
Answer
Effort (E): The force we apply to a simple machine. Load (L): The force the simple machine has to overcome. Mechanical Advantage (MA): The ratio of load to effort. Formula: MA = Load/Effort = L/E. It …
A nail puller applies 40 N force to pull a nail. If the mechanical advantage is 3, what is the load applied by the nail?
Answer
Given: Effort = 40 N, MA = 3, Load = ? Formula: MA = Load/Effort Therefore: Load = MA × Effort Load = 3 × 40 N = 120 N The nail applies a load of 120 N.
What is a lever? Define fulcrum, load arm, and effort arm.
Answer
Lever: A rigid rod that can rotate around a fixed point called fulcrum. Fulcrum: The fixed point around which the lever rotates. Load arm (LA): Perpendicular distance from load to fulcrum. Effort arm …
State the principle of lever and derive the formula for mechanical advantage of a lever.
Answer
Principle of Lever: When a lever is in equilibrium, Load × Load arm = Effort × Effort arm (L × LA = E × EA). Derivation: L × LA = E × EA, Therefore L/E = EA/LA. Since MA = L/E, Mechanical Advantage of…
What is a first order lever? Give examples and explain when MA is greater than, equal to, or less than 1.
Answer
First Order Lever: Fulcrum is between load and effort. Examples: common balance, scissors, seesaw, crowbar. MA = EA/LA. If EA > LA, MA > 1. If EA = LA, MA = 1. If EA < LA, MA < 1. In common balance, E…
Describe second order lever with examples. What is its mechanical advantage?
Answer
Second Order Lever: Load is between effort and fulcrum. Examples: wheelbarrow, nutcracker, bottle opener. In second order levers, effort arm is always longer than load arm (EA > LA). Therefore, mechan…
What is a third order lever? Give examples and explain its advantage despite MA < 1.
Answer
Third Order Lever: Effort is between load and fulcrum. Examples: forceps, tweezers, fishing rod, human arm. Load arm is longer than effort arm (LA > EA), so MA < 1. Advantage: Helps handle objects saf…
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Sources & Official References
- Kerala Board of Public Examinations — keralapareekshabhavan.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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