#1
Which of the following is a scalar quantity?
Mass
ExplanationScalar quantity has only magnitude.
#2
What is the SI unit of force?
Newton
ExplanationNamed after Sir Isaac Newton.
#3
What is the formula for calculating kinetic energy?
KE = 1/2 * mv^2
ExplanationDerived from Newton's laws.
#4
Which of the following quantities is a vector quantity?
Displacement
ExplanationHas both magnitude and direction.
#5
Which law of motion states that every object will remain at rest or in uniform motion unless acted upon by an external force?
Newton's First Law
ExplanationAlso known as the law of inertia.
#6
A ball is thrown vertically upwards. At the highest point of its motion, the velocity of the ball is:
Zero
ExplanationAt the highest point, the velocity changes direction, making its magnitude zero.
#7
Which of the following equations represents Newton's second law of motion?
F = ma
ExplanationDescribes the relationship between force, mass, and acceleration.
#8
What is the work done by a force when the displacement of an object is perpendicular to the direction of the force?
Zero
ExplanationAngle between force and displacement is 90°.
#9
Which of the following statements defines inertia?
The tendency of an object to resist a change in motion
ExplanationFundamental property of matter.
#10
What is the acceleration due to gravity near the surface of the Earth?
9.8 m/s^2
ExplanationVaries slightly with location.
#11
Which of the following is a unit of torque?
Newton-meter
ExplanationProduct of force and distance.
#12
Which of the following is a conservative force?
Gravitational force
ExplanationWork done by conservative forces is path-independent.
#13
Which of the following statements is true regarding elastic collisions?
Kinetic energy is conserved
ExplanationNo kinetic energy is converted into other forms.
#14
What is the principle of conservation of momentum?
The total momentum of a closed system remains constant if no external forces act on it
ExplanationResult of Newton's third law.
#15
Which of the following is a non-inertial frame of reference?
Frame accelerating uniformly
ExplanationExperience fictitious forces.
#16
Which of the following is true regarding Newton's third law of motion?
For every action, there is an equal and opposite reaction
ExplanationPairs of forces.
#17
Which law of thermodynamics states that energy cannot be created or destroyed, only transformed from one form to another?
First Law
ExplanationAlso known as the law of conservation of energy.
#18
Which of the following statements is true regarding the center of mass?
It depends on the shape and mass distribution of the object
ExplanationBalance point of an object.