#1
Which of the following is a scalar quantity?
Distance
ExplanationScalar quantities have only magnitude, not direction.
#2
If an object is accelerating, what can be said about its velocity?
It is increasing.
ExplanationAcceleration indicates a change in velocity.
#3
What is the formula for average speed?
Speed = Distance/Time
ExplanationAverage speed is the total distance traveled divided by the total time taken.
#4
Which of the following is an example of projectile motion?
A ball thrown into the air
ExplanationObjects projected into the air and subject to gravity follow projectile motion.
#5
What is the unit of force in the International System of Units (SI)?
Newton
ExplanationForce is measured in Newtons.
#6
What is the law of inertia?
An object at rest stays at rest, and an object in motion stays in motion with constant velocity unless acted on by a net external force.
ExplanationObjects tend to maintain their state of motion unless acted upon by an external force.
#7
What does the term 'displacement' refer to in physics?
The change in position of an object
ExplanationDisplacement measures change in position from initial to final.
#8
Which of the following is an example of circular motion?
A satellite orbiting Earth
ExplanationSatellites orbit Earth in a circular path.
#9
Which of Newton's laws states that an object at rest will stay at rest, and an object in motion will stay in motion with the same speed and in the same direction unless acted on by an unbalanced external force?
Newton's First Law
ExplanationAlso known as the law of inertia.
#10
What is the difference between speed and velocity?
Speed is a scalar quantity, and velocity is a vector quantity.
ExplanationVelocity includes both magnitude and direction.
#11
If an object is in free fall near the surface of the Earth, what is the acceleration due to gravity?
9.8 m/s²
ExplanationObjects in free fall accelerate at approximately 9.8 m/s² due to gravity.
#12
What is the difference between distance and displacement?
Distance is a scalar quantity, and displacement is a vector quantity.
ExplanationDisplacement measures the shortest path between initial and final positions.
#13
What is the SI unit of velocity?
Meters per second (m/s)
ExplanationVelocity is measured in meters per second.
#14
In physics, what is the term for the rate of change of velocity?
Acceleration
ExplanationAcceleration measures how velocity changes over time.
#15
In which direction does friction act when an object is moving on a horizontal surface?
Opposite to the direction of motion
ExplanationFriction opposes the motion of the object.
#16
What is the principle of conservation of energy?
The total energy of an isolated system remains constant over time.
ExplanationEnergy cannot be created or destroyed, only transformed.
#17
If an object is in equilibrium, what can be said about the net force acting on it?
The net force is zero.
ExplanationIn equilibrium, forces are balanced and the net force is zero.
#18
What is the formula for gravitational potential energy?
PE = mgh
ExplanationGravitational potential energy depends on mass, gravity, and height.