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Mechanics - Laws of Motion

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Q. A 10 kg box is at rest on a frictionless surface. A force of 30 N is applied. What is the final velocity after 3 seconds? (2023)
  • A. 5 m/s
  • B. 10 m/s
  • C. 15 m/s
  • D. 20 m/s
Q. A 10 kg object is at rest. A force of 30 N is applied to it. What will be its velocity after 3 seconds? (2023)
  • A. 3 m/s
  • B. 6 m/s
  • C. 9 m/s
  • D. 12 m/s
Q. A 10 kg object is hanging from a rope. What is the tension in the rope if the object is at rest? (2019)
  • A. 0 N
  • B. 10 N
  • C. 100 N
  • D. 50 N
Q. A 10 kg object is in free fall. What is the force acting on it due to gravity? (2019)
  • A. 10 N
  • B. 20 N
  • C. 30 N
  • D. 40 N
Q. A 10 kg object is subjected to a net force of 30 N. What is the object's acceleration? (2019)
  • A. 1 m/s²
  • B. 2 m/s²
  • C. 3 m/s²
  • D. 4 m/s²
Q. A 12 kg object is at rest. A force of 36 N is applied to it. What is the acceleration of the object? (2021)
  • A. 1 m/s²
  • B. 2 m/s²
  • C. 3 m/s²
  • D. 4 m/s²
Q. A 12 kg object is at rest. A force of 36 N is applied to it. What will be its velocity after 3 seconds? (2020)
  • A. 1 m/s
  • B. 2 m/s
  • C. 3 m/s
  • D. 4 m/s
Q. A 12 kg object is moving with a velocity of 3 m/s. What is its momentum? (2019)
  • A. 36 kg·m/s
  • B. 12 kg·m/s
  • C. 9 kg·m/s
  • D. 24 kg·m/s
Q. A 12 kg object is pulled with a force of 48 N. If the frictional force is 12 N, what is the acceleration of the object? (2023)
  • A. 2 m/s²
  • B. 3 m/s²
  • C. 4 m/s²
  • D. 5 m/s²
Q. A 15 kg box is pushed with a force of 60 N. If the frictional force is 15 N, what is the acceleration of the box? (2023)
  • A. 2 m/s²
  • B. 3 m/s²
  • C. 4 m/s²
  • D. 5 m/s²
Q. A 2 kg mass is dropped from a height. What is the force acting on it just before it hits the ground? (2022)
  • A. 2 N
  • B. 10 N
  • C. 20 N
  • D. 0 N
Q. A 2 kg object is dropped from a height. What is the force acting on it just before it hits the ground? (2022)
  • A. 2 N
  • B. 9.8 N
  • C. 19.6 N
  • D. 29.4 N
Q. A 2 kg object is moving with a velocity of 10 m/s. What is its momentum? (2021)
  • A. 5 kg·m/s
  • B. 10 kg·m/s
  • C. 15 kg·m/s
  • D. 20 kg·m/s
Q. A 20 kg cart is pulled with a force of 80 N. If the frictional force is 20 N, what is the acceleration of the cart? (2020)
  • A. 2 m/s²
  • B. 3 m/s²
  • C. 4 m/s²
  • D. 5 m/s²
Q. A 20 kg object is acted upon by a net force of 80 N. What is the acceleration of the object? (2023)
  • A. 2 m/s²
  • B. 3 m/s²
  • C. 4 m/s²
  • D. 5 m/s²
Q. A 20 kg object is moving with a velocity of 5 m/s. What is its kinetic energy? (2021)
  • A. 50 J
  • B. 100 J
  • C. 200 J
  • D. 500 J
Q. A 20 kg object is thrown vertically upward with a force of 100 N. What is the net force acting on the object? (2023)
  • A. 0 N
  • B. 20 N
  • C. 80 N
  • D. 100 N
Q. A 25 kg object is pulled with a force of 100 N. If the frictional force is 25 N, what is the acceleration of the object? (2023)
  • A. 2 m/s²
  • B. 3 m/s²
  • C. 4 m/s²
  • D. 5 m/s²
Q. A 3 kg object is subjected to a net force of 12 N. What is the acceleration of the object? (2022)
  • A. 2 m/s²
  • B. 3 m/s²
  • C. 4 m/s²
  • D. 5 m/s²
Q. A 5 kg object is moving with a constant velocity. What is the net force acting on it? (2022)
  • A. 0 N
  • B. 5 N
  • C. 10 N
  • D. 15 N
Q. A 5 kg object is moving with a velocity of 10 m/s. What is its momentum? (2021)
  • A. 50 kg m/s
  • B. 100 kg m/s
  • C. 150 kg m/s
  • D. 200 kg m/s
Q. A 5 kg object is moving with a velocity of 4 m/s. What is its momentum? (2023)
  • A. 10 kg m/s
  • B. 15 kg m/s
  • C. 20 kg m/s
  • D. 25 kg m/s
Q. A 6 kg object is pushed with a force of 18 N. What is the resulting acceleration? (2023)
  • A. 2 m/s²
  • B. 3 m/s²
  • C. 4 m/s²
  • D. 5 m/s²
Q. A block of mass 5 kg is pulled along a horizontal surface with a force of 20 N. If the frictional force acting on the block is 5 N, what is the acceleration of the block? (2021)
  • A. 2 m/s²
  • B. 3 m/s²
  • C. 4 m/s²
  • D. 5 m/s²
Q. A block of mass 5 kg is pulled on a horizontal surface with a force of 20 N. If the frictional force acting on the block is 5 N, what is the acceleration of the block? (2021)
  • A. 1 m/s²
  • B. 2 m/s²
  • C. 3 m/s²
  • D. 4 m/s²
Q. A force of 100 N is applied to a 50 kg object. What is the acceleration of the object? (2022)
  • A. 1 m/s²
  • B. 2 m/s²
  • C. 3 m/s²
  • D. 4 m/s²
Q. A force of 100 N is applied to a 50 kg object. What is the resulting acceleration? (2023)
  • A. 1 m/s²
  • B. 2 m/s²
  • C. 3 m/s²
  • D. 4 m/s²
Q. A force of 30 N is applied to a 3 kg object. What is the resulting acceleration? (2020)
  • A. 5 m/s²
  • B. 10 m/s²
  • C. 15 m/s²
  • D. 20 m/s²
Q. A force of 50 N is applied to a 25 kg object. What is the acceleration of the object? (2019)
  • A. 1 m/s²
  • B. 2 m/s²
  • C. 3 m/s²
  • D. 4 m/s²
Q. A force of 50 N is applied to a 25 kg object. What is the object's acceleration? (2020)
  • A. 1 m/s²
  • B. 2 m/s²
  • C. 3 m/s²
  • D. 4 m/s²
Showing 1 to 30 of 42 (2 Pages)

Mechanics - Laws of Motion MCQ & Objective Questions

Understanding the "Mechanics - Laws of Motion" is crucial for students preparing for various school and competitive exams. This topic lays the foundation for many concepts in physics and is frequently tested through MCQs and objective questions. Practicing these questions not only enhances your grasp of the subject but also boosts your confidence during exams, helping you score better.

What You Will Practise Here

  • Newton's Laws of Motion: Definitions and applications
  • Concept of inertia and its implications
  • Force and mass: Understanding the relationship
  • Friction: Types, causes, and effects
  • Free-body diagrams: Drawing and interpreting
  • Equations of motion: Derivation and applications
  • Real-world applications of laws of motion

Exam Relevance

The topic of "Mechanics - Laws of Motion" is a staple in the syllabus for CBSE, State Boards, NEET, and JEE. Students can expect questions that test their understanding of fundamental concepts, problem-solving skills, and application of formulas. Common question patterns include numerical problems, conceptual MCQs, and theoretical questions that require a clear understanding of the laws and their implications.

Common Mistakes Students Make

  • Confusing Newton's first law with the concept of inertia.
  • Misapplying the equations of motion in different contexts.
  • Overlooking the role of friction in motion problems.
  • Failing to accurately interpret free-body diagrams.
  • Neglecting units and dimensions while solving numerical problems.

FAQs

Question: What are Newton's three laws of motion?
Answer: Newton's first law states that an object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force. The second law relates force, mass, and acceleration (F=ma), while the third law states that for every action, there is an equal and opposite reaction.

Question: How can I improve my understanding of laws of motion?
Answer: Regular practice of MCQs and objective questions, along with reviewing key concepts and formulas, can significantly enhance your understanding of laws of motion.

Start solving practice MCQs today to test your understanding and solidify your grasp of "Mechanics - Laws of Motion". Your preparation will pave the way for success in your exams!

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