Laws of Mechanics From rest to motion — it all starts here!Master Newton’s world of inertia, force, and reaction, and see if you can keep every law in balance like a true MechWorlz champ. 1 / 20 The branch of mechanics which deals with bodies in motion is — Statics Dynamics Kinematics Friction Dynamics focuses on moving bodies and the forces causing that motion. 2 / 20 1 kgf equals — 9.81 N 10 N 1 N 0.981 N 1 kilogram-force = weight of 1 kg mass under gravity (9.81 m/s²). 3 / 20 The Newton is equivalent to — kg·m/s kg·m/s² kg·m²/s kg/s² 1 Newton = 1 kg·m/s² as per F = m·a. 4 / 20 Unit of impulse is same as that of — Work Momentum Energy Force Impulse = Force × Time, which has the same unit as momentum (N·s). 5 / 20 The area under velocity–time graph represents — Displacement Acceleration Force Energy The area gives total displacement covered during motion. 6 / 20 The rate of change of displacement is — Acceleration Momentum Velocity Force Velocity is the rate at which displacement changes with time. 7 / 20 Which one is a scalar quantity? Force Displacement Work Velocity Work has magnitude only, not direction, so it’s a scalar quantity. 8 / 20 The SI unit of moment is — N/m N·m N/m² J/m Moment is force × perpendicular distance, so its unit is newton-metre (N·m). 9 / 20 The principle of transmissibility of forces states that — The line of action of force doesn’t matter Force can act anywhere A force can be moved along its line of action without changing the effect Force direction changes the effect A force’s external effect on a rigid body remains the same along its line of action. 10 / 20 The term “mechanics” is the study of — Heat and energy Motion and forces Sound and waves Electricity Mechanics deals with motion, forces, and their effects on bodies. 11 / 20 The rate of change of momentum is equal to — Impulse Force Work Energy Force equals the time rate of change of momentum. 12 / 20 Inertia is the property of — Energy storage Resistance to motion change Elasticity Strength Inertia is a body’s natural tendency to resist any change in its motion. 13 / 20 Mass × acceleration equals — Power Work Force Energy Force is the product of mass and acceleration, according to Newton’s second law. 14 / 20 A rigid body means — Body with infinite mass Body with negligible deformation Flexible body Plastic body In mechanics, rigid bodies are assumed not to deform under applied forces. 15 / 20 The point through which the total weight of a body acts is — Centroid Center of Gravity Moment Center Axis Center of gravity is the point where the body’s entire weight acts vertically downward 16 / 20 For every action, there is an equal and opposite reaction. This is — Newton’s 3rd Law Pascal’s Law Hooke’s Law Archimedes’ Principle Every force has an equal and opposite counter-force — Newton’s third law. 17 / 20 Force equals mass times acceleration is — Law of Momentum Newton’s 2nd Law Principle of Work Hooke’s Law Newton’s second law relates force, mass, and acceleration (F = m·a). 18 / 20 A body remains at rest or in uniform motion unless acted upon by an external force. This is — Newton’s 1st Law Newton’s 2nd Law Newton’s 3rd Law None The first law of motion defines inertia — the tendency to resist changes in motion. 19 / 20 The unit of force in SI system is — Dyne Newton Joule Watt Force is measured in newtons (N), where 1 N = 1 kg·m/s². 20 / 20 Which of the following is not a law of motion by Newton? Law of inertia Law of momentum Law of gravitation Law of action and reaction Newton gave three laws of motion — gravitation is a separate law discovered later by him. Your score isThe average score is 63% 0% Restart quiz
