Physics Concepts Practice Questions
K-12 (Philippines) · K-12 Science · 146 free MCQs with instant results and detailed explanations.
146
Total
50
Easy
72
Medium
24
Hard
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Sample Questions from Physics Concepts
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Q1
Easy
If a car travels 60 kilometers in 1 hour, what is its average speed?
A.
60 km/h
B.
30 km/h
C.
90 km/h
D.
120 km/h
Show Answer & Explanation
Correct Answer: A
Average speed is calculated by dividing the total distance traveled by the time taken. Here, 60 km divided by 1 hour equals 60 km/h.
Q2
Easy
Which of the following statements best describes gravity?
A.
It is a force that attracts two bodies towards each other.
B.
It is a force that pushes two bodies apart.
C.
It only acts on large objects.
D.
It is a type of electromagnetic force.
Show Answer & Explanation
Correct Answer: A
Gravity is a fundamental force of nature that attracts two bodies towards each other, regardless of their size, and is responsible for the attraction between all masses.
Q3
Easy
Which of the following describes an object's resistance to changes in its state of motion?
A.
Momentum
B.
Inertia
C.
Force
D.
Energy
Show Answer & Explanation
Correct Answer: B
Inertia is the property of an object that resists changes to its state of motion. It is directly related to the mass of the object.
Q4
Medium
What happens to the gravitational force between two objects if the distance between them is doubled?
A.
It becomes four times weaker.
B.
It becomes twice as strong.
C.
It remains unchanged.
D.
It becomes half as strong.
Show Answer & Explanation
Correct Answer: A
According to Newton's law of universal gravitation, the force is inversely proportional to the square of the distance between the two objects. If the distance is doubled, the force becomes one-fourth of its original value, which means it is four times weaker.
Q5
Medium
A 1 kg object is moving with a velocity of 5 m/s. What is its kinetic energy?
A.
2.5 J
B.
5 J
C.
12.5 J
D.
25 J
Show Answer & Explanation
Correct Answer: C
Kinetic energy (KE) is calculated using the formula KE = 1/2 mv^2. For a mass (m) of 1 kg and a velocity (v) of 5 m/s, KE = 1/2 * 1 * (5^2) = 12.5 J.
Q6
Medium
Which of the following statements accurately describes the relationship between mass and weight?
A.
Mass is the force of gravity acting on an object.
B.
Weight is a measure of the amount of matter in an object.
C.
Mass remains constant regardless of location, while weight can change.
D.
Weight and mass are the same concept.
Show Answer & Explanation
Correct Answer: C
Mass is a measure of the amount of matter in an object and remains constant, while weight is the force of gravity acting on that mass, which can vary based on the gravitational field strength.
Q7
Medium
What is the total resistance in a series circuit with three resistors of 2 Ω, 3 Ω, and 5 Ω?
A.
10 Ω
B.
5 Ω
C.
15 Ω
D.
8 Ω
Show Answer & Explanation
Correct Answer: A
In a series circuit, the total resistance (R_total) is the sum of the individual resistances. Therefore, R_total = 2 Ω + 3 Ω + 5 Ω = 10 Ω.
Q8
Hard
A 2 kg block is sliding down a frictionless incline that makes a 30-degree angle with the horizontal. What is the acceleration of the block down the incline?
A.
4.9 m/s²
B.
5.1 m/s²
C.
3.3 m/s²
D.
9.8 m/s²
Show Answer & Explanation
Correct Answer: A
The acceleration down the incline can be calculated using the formula a = g * sin(θ). Here, g = 9.8 m/s² and θ = 30°, giving a = 9.8 * sin(30°) = 9.8 * 0.5 = 4.9 m/s².
Q9
Hard
A car is moving with a constant speed of 20 m/s around a circular track of radius 50 m. What is the centripetal acceleration of the car?
A.
8 m/s²
B.
4 m/s²
C.
10 m/s²
D.
16 m/s²
Show Answer & Explanation
Correct Answer: A
The centripetal acceleration (a_c) is given by the formula a_c = v² / r. Substituting the values: a_c = (20 m/s)² / 50 m = 400 m²/s² / 50 m = 8 m/s².
Q10
Hard
A 2 kg object is attached to a spring with a spring constant of 300 N/m. If the object is displaced 0.1 m from its equilibrium position and released, what will be its maximum speed during oscillation?
A.
1.22 m/s
B.
0.77 m/s
C.
1.00 m/s
D.
1.56 m/s
Show Answer & Explanation
Correct Answer: A
The maximum speed (v_max) of an object in simple harmonic motion is given by v_max = ωA, where ω = √(k/m) and A is the amplitude. Here, k = 300 N/m and m = 2 kg, giving ω = √(300/2) = √150 = 12.25 rad/s. Thus, v_max = 12.25 * 0.1 = 1.22 m/s.
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Physics Concepts — K-12 (Philippines) K-12 Science Practice Questions Online
This page contains 146 practice MCQs for the chapter Physics Concepts in K-12 (Philippines) K-12 Science. The questions are organized by difficulty — 50 easy, 72 medium, 24 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit.