Simple MachinesPractice Questions & MCQs
Practice Simple Machines questions from Work, Energy, and Simple Machines (Class 9 Science) - important MCQs with answers and step-by-step solutions. Solve the sample questions below, then practice the full set free on the RankByte app.
Simple MachinesQuiz - Solve & Score
Q1. Scissors and a seesaw are everyday examples of which simple machine?
- A.the lever
- B.the inclined plane
- C.the pulley
- D.the screw
Answer: A. the lever
Spot-the-setup - a typical physics numerical. We are after the quantity the stem asks for. Tool of choice - F = m*a, V = I*R, n = m/M, v = f*lambda, KE = (1/2) m v^2). Rearrange it for the unknown before substituting. Numbers in: F = m*a, V = I*R, n = m/M, v = f*lambda, KE = (1/2) m v^2). Common-sense check: recall the defining law / equation for the named quantity (e.g. Lock in option A) the lever. Trap-watch: option B) 'the inclined plane' is wrong because An inclined plane is a ramp, not a pivoted bar like scissors/seesaw; option C) 'the pulley' doesn't hold - A pulley uses a wheel and rope, unlike a pivoted lever.
Q2. Why is the useful output of a real ramp slightly less than mgh in practice?
- A.friction between the load and ramp wastes some energy as heat
- B.the ramp creates negative energy
- C.gravity does extra work upward
- D.the load gains mass on the ramp
Answer: A. friction between the load and ramp wastes some energy as heat
Q3. Which change would MOST improve a machine's efficiency?
- A.reducing friction in its moving parts
- B.adding more friction
- C.increasing the load beyond its limit
- D.removing all lubrication
Answer: A. reducing friction in its moving parts
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Where can I practise Simple Machines questions for Class 9 Science?
RankByte has Simple Machines practice questions and MCQs from Work, Energy, and Simple Machines (Class 9 Science), each with the correct answer and a step-by-step solution - free to start.
Are these Simple Machines questions important for the exam?
Yes. These Simple Machines important questions follow the Science exam pattern (CBSE Boards, plus JEE and NEET foundation), so they help with both school and competitive prep.
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Every Simple Machines question on RankByte comes with the correct answer and a full step-by-step solution, so you learn the concept instead of just guessing.