#1
Which of the following best describes Newton's first law of motion?
An object at rest tends to stay at rest, and an object in motion tends to stay in motion unless acted upon by an external force.
ExplanationObjects maintain their state of motion unless acted upon by an external force.
#2
What is the SI unit of force?
Newton
ExplanationStandard unit for measuring force.
#3
What happens to an object's velocity when the net force acting on it is zero?
It remains constant
ExplanationNo change in velocity in the absence of net force.
#4
What is inertia?
The tendency of an object to resist changes in its velocity.
ExplanationObject's resistance to changes in motion.
#5
What is the formula to calculate momentum?
Momentum = mass * velocity
ExplanationProduct of mass and velocity.
#6
Which of the following statements is true regarding Hooke's Law?
It states that the force exerted by a spring is inversely proportional to its displacement.
ExplanationRelation between force and displacement in springs.
#7
A car accelerates from rest at a rate of 2 m/s² for 5 seconds. What is its final velocity?
10 m/s
ExplanationFinal speed achieved after accelerating for a given time.
#8
Which of the following equations represents Newton's second law of motion?
F = m * a
ExplanationRelation between force, mass, and acceleration.
#9
What is the relationship between force, mass, and acceleration according to Newton's second law?
Force is directly proportional to acceleration and inversely proportional to mass.
ExplanationForce, mass, and acceleration are interrelated.
#10
Which of the following scenarios best demonstrates balanced forces?
A book sliding across a table at a constant speed.
ExplanationEqual forces acting in opposite directions resulting in no acceleration.
#11
Which of the following statements is true regarding friction?
Friction always opposes motion.
ExplanationFriction acts opposite to the direction of motion.
#12
What does the term 'terminal velocity' refer to?
The maximum speed an object can reach when falling through a fluid.
ExplanationMaximum speed attained during free fall.
#13
When an object is in free fall near the surface of the Earth, what is the magnitude of its acceleration?
9.8 m/s²
ExplanationAcceleration experienced due to gravity near Earth's surface.
#14
What is the net force acting on an object in equilibrium?
Zero
ExplanationResultant force when all forces are balanced.
#15
Which of the following is an example of non-contact force?
Magnetic force
ExplanationForce exerted without direct physical contact.
#16
Which of the following is an example of projectile motion?
A stone thrown horizontally off a cliff.
ExplanationObject moving under the influence of gravity.
#17
What is centripetal force?
A force that acts to pull objects toward the center of a circle.
ExplanationForce maintaining circular motion.
#18
Which of the following statements is true about kinetic friction?
It opposes the motion of an object in motion.
ExplanationFriction acting on moving objects.