OTEE General Science Principles 2 — Questions and Answers
Question 1: According to Newton's Second Law of Motion, if a net force of 30 N acts on a 6 kg object, what is its acceleration?
- 5 m/s² (Correct answer)
- 180 m/s²
- 0.2 m/s²
- 24 m/s²
Correct answer: 5 m/s²
Newton's Second Law states F = ma, so a = F/m = 30/6 = 5 m/s².
Question 2: Which type of energy is stored in a compressed spring?
- Kinetic energy
- Elastic potential energy (Correct answer)
- Chemical energy
- Thermal energy
Correct answer: Elastic potential energy
A compressed spring stores elastic potential energy, which is released when the spring returns to its natural length.
Question 3: Which of the following best describes electrical resistance in a conductor?
- The rate of electron flow through a circuit
- The force that drives current through a circuit
- The opposition to the flow of electric current (Correct answer)
- The total energy consumed by a circuit
Correct answer: The opposition to the flow of electric current
Electrical resistance is the opposition a material offers to the flow of electric current, measured in ohms.
Question 4: A wave with a frequency of 200 Hz and a wavelength of 1.5 m travels at what speed?
- 133 m/s
- 300 m/s (Correct answer)
- 300 Hz
- 0.0075 m/s
Correct answer: 300 m/s
Wave speed = frequency × wavelength = 200 Hz × 1.5 m = 300 m/s.
Question 5: When light passes from air into water, it slows down and bends toward the normal. This phenomenon is called:
- Reflection
- Diffraction
- Refraction (Correct answer)
- Dispersion
Correct answer: Refraction
Refraction is the bending of light as it passes from one medium to another due to a change in speed.
Question 6: The First Law of Thermodynamics states that energy:
- Can be created from matter but never destroyed
- Always flows from cold objects to hot objects
- Can neither be created nor destroyed, only converted (Correct answer)
- Decreases in every real process
Correct answer: Can neither be created nor destroyed, only converted
The First Law of Thermodynamics is the law of conservation of energy: energy cannot be created or destroyed, only transformed.
Question 7: A pulley system uses 3 rope segments to support a load. Ignoring friction, if the load weighs 600 N, the effort force required is:
- 1800 N
- 600 N
- 200 N (Correct answer)
- 300 N
Correct answer: 200 N
With 3 supporting rope segments, the mechanical advantage is 3, so effort = load/MA = 600/3 = 200 N.
OTEE General Science Principles 2
According to Newton's Second Law of Motion, if a net force of 30 N acts on a 6 kg object, what is its acceleration?