#1
Which of the following is a fundamental quantity in classical mechanics?
Velocity
ExplanationVelocity is a fundamental quantity representing the rate of change of an object's position with respect to time in a specific direction.
#2
What is Hooke's Law related to?
Elasticity of materials
ExplanationHooke's Law relates the force exerted by a spring to the displacement from its equilibrium position and is commonly used to describe the elasticity of materials.
#3
In classical mechanics, what does the term 'inertia' refer to?
The resistance of an object to changes in its state of motion
ExplanationInertia is the property of matter that represents the resistance of an object to changes in its state of motion.
#4
Which law of motion is expressed by the equation F = ma?
Newton's Second Law
ExplanationThe equation F = ma represents Newton's Second Law of motion, stating that the force acting on an object is equal to the mass of the object multiplied by its acceleration.
#5
Which of the following is a scalar quantity?
Distance
ExplanationDistance is a scalar quantity, representing the magnitude of the displacement between two points without regard to direction.
#6
What is Newton's second law of motion?
The rate of change of momentum is proportional to the applied force
ExplanationNewton's second law states that the force acting on an object is equal to the rate of change of its momentum, and the proportionality constant is the object's mass.
#7
What is work done in physics?
A measure of energy transfer that occurs when an object is moved
ExplanationWork done is the transfer of energy that occurs when a force displaces an object in the direction of the force applied.
#8
What is the principle of conservation of angular momentum?
The total angular momentum of a system is constant if no external torque acts on it.
ExplanationThe conservation of angular momentum states that the total angular momentum of a system remains constant if no external torque acts on it.
#9
What is the formula for gravitational potential energy?
PE = mgh
ExplanationThe formula for gravitational potential energy (PE) is given by PE = mgh, where m is the mass of the object, g is the acceleration due to gravity, and h is the height above a reference point.
#10
What is the equation for torque (moment of force) in classical mechanics?
Torque = Force × Distance
ExplanationTorque, or the moment of force, is calculated by multiplying the force applied to an object by the distance from the axis of rotation.
#11
In the context of classical mechanics, what is a conservative force?
A force that depends only on the initial and final positions of an object
ExplanationA conservative force is one for which the work done in moving an object between two points is independent of the path taken and depends only on the initial and final positions of the object.
#12
What is the principle of virtual work?
A system is in equilibrium when the virtual work done by external forces is zero for any virtual displacement
ExplanationThe principle of virtual work states that a system is in equilibrium when the virtual work done by external forces is zero for any virtual displacement.
#13
Which of the following is a non-contact force in classical mechanics?
Gravitational force
ExplanationGravitational force is a non-contact force that acts between masses and is responsible for the attraction between objects with mass.
#14
What is the principle of least action in classical mechanics?
The total action in a system is minimized for the actual motion taken by the system.
ExplanationThe principle of least action states that the actual motion taken by a system is the one for which the total action is minimized.
#15
In classical mechanics, what does the term 'impulse' refer to?
The product of force and time
ExplanationImpulse is the product of the force applied to an object and the time over which it is applied, leading to a change in the object's momentum.