Sample Physics Questions
Q1: An object is dropped from rest. How far does it fall in 2 seconds? (g = 10 m/s²)
A. 10 m
B. 20 m ✓
C. 30 m
D. 40 m
Q2: A circuit has a 12V battery and a 4Ω resistor. What is the current?
A. 0.3 A
B. 3 A ✓
C. 8 A
D. 48 A
Q3: Which of Newton's laws states that every action has an equal and opposite reaction?
A. First law
B. Second law
C. Third law ✓
D. Law of Gravitation
📖 Study Tips for Physics
1
Draw a free-body diagram for every mechanics problem — it forces you to identify all forces before writing equations.
2
Memorize Newton's three laws in your own words, then apply each to everyday examples to build intuition.
3
For electricity problems, remember Ohm's Law (V = IR) and Kirchhoff's Laws (junction rule and loop rule) and practice circuit analysis.
4
Units are your best error-checker: carry units through every calculation and verify the final answer has the correct unit.
❓ Physics FAQ
What is the difference between speed and velocity?
▾
Speed is a scalar — it only has magnitude (e.g., 60 km/h). Velocity is a vector — it has both magnitude and direction (e.g., 60 km/h north). An object moving in a circle at constant speed has changing velocity because its direction changes.
What is the law of conservation of energy?
▾
Energy cannot be created or destroyed, only converted from one form to another. In a closed system, the total mechanical energy (kinetic + potential) remains constant if only conservative forces act. Friction converts mechanical energy to heat.
What is the difference between work and power?
▾
Work (W = Fd cosθ) measures the energy transferred by a force over a displacement, measured in joules. Power (P = W/t) is the rate at which work is done, measured in watts (joules per second).
Browse All Quiz Topics