#1
What is the SI unit of force?
Newton
ExplanationForce unit named after Isaac Newton.
#2
Which of the following is not a fundamental force in nature?
Friction
ExplanationFriction is a contact force, not a fundamental force.
#3
Which law of motion is also known as the law of inertia?
Newton's First Law
ExplanationObjects remain at rest or in motion unless acted upon.
#4
What is the relationship between force, mass, and acceleration according to Newton's Second Law?
Force = Mass * Acceleration
ExplanationForce equals mass times acceleration.
#5
What is the unit of torque?
Newton-meter
ExplanationProduct of force and distance.
#6
Which law of motion explains the behavior of an object in equilibrium?
Newton's First Law
ExplanationObjects remain stationary or move with constant velocity.
#7
What is the unit of impulse?
Newton-second
ExplanationChange in momentum over time.
#8
What is the acceleration due to gravity on the surface of Earth?
9.8 m/s²
ExplanationAcceleration experienced by falling objects.
#9
Which of the following is NOT a vector quantity?
Mass
ExplanationScalar property related to quantity of matter.
#10
What is the law that states that for every action, there is an equal and opposite reaction?
Newton's Third Law
ExplanationPrinciple of action and reaction.
#11
Which of the following is a measure of an object's resistance to changes in its rotational motion?
Inertia
ExplanationProperty of mass related to rotation.
#12
What is the formula for calculating momentum?
Mass * Velocity
ExplanationProduct of mass and velocity.
#13
Which of the following is NOT a conservative force?
Friction
ExplanationFriction dissipates energy, unlike conservative forces.
#14
What does the term 'terminal velocity' refer to?
The velocity of an object when air resistance balances its weight
ExplanationMaximum speed due to opposing forces.
#15
Which of the following is NOT a type of friction?
Centripetal friction
ExplanationCentripetal force aids circular motion.
#16
What is the formula for gravitational force between two objects?
F = G * m1 * m2 / r^2
ExplanationInverse square law for gravitational attraction.
#17
What is the work-energy theorem?
The work done by an external force is equal to the change in kinetic energy
ExplanationRelationship between work and kinetic energy.
#18
What does Hooke's Law describe?
The force exerted by a spring is directly proportional to its displacement
ExplanationElastic force proportional to deformation.
#19
What is the formula for gravitational potential energy?
PE = mgh
ExplanationEnergy stored due to position in a gravitational field.
#20
What is the law of conservation of energy?
Energy cannot be created or destroyed, only transformed from one form to another
ExplanationPrinciple of energy preservation.
#21
What is the center of mass?
The point where an object's mass is concentrated
ExplanationAverage position of mass distribution.
#22
What is the relationship between torque, force, and distance from the pivot point?
Torque = Force * Distance
ExplanationRotational force multiplied by lever arm.
#23
In a system with constant velocity, what is the net force acting on the system?
Zero
ExplanationNo change in motion implies zero net force.
#24
What is the principle behind the conservation of angular momentum?
Angular momentum remains constant in the absence of external torque
ExplanationConservation law for rotational motion.
#25
Which of the following is an example of a non-inertial frame of reference?
A merry-go-round spinning at a constant rate
ExplanationAccelerating reference frame.