Q1
Which law states that for every action, there is an equal and opposite reaction?
π‘ Show Hint
π‘
This law is often associated with Sir Isaac Newton.
A
Newton's First Law
B
Newton's Second Law
C
Newton's Third Law
D
Law of Universal Gravitation
π Explanation: Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction, which explains how forces act in pairs.
Q2
What is the principle of conservation of energy?
π‘ Show Hint
π‘
Energy cannot be created or destroyed.
A
Energy can be created
B
Energy is always lost
C
Energy can be transformed
D
Energy can only be destroyed
π Explanation: The principle of conservation of energy states that energy can neither be created nor destroyed; it can only be transformed from one form to another.
Q3
What is the formula for kinetic energy?
π‘ Show Hint
π‘
It involves mass and velocity.
A
KE = mv
B
KE = mgh
C
KE = 1/2 mvΒ²
D
KE = 2mv
π Explanation: Kinetic energy (KE) is given by the formula KE = 1/2 mvΒ², where m is mass and v is velocity. This shows how energy depends on mass and the square of velocity.
Q4
In which type of wave do particles of the medium move parallel to the direction of wave propagation?
π‘ Show Hint
π‘
Think about sound waves.
A
Transverse waves
B
Longitudinal waves
C
Surface waves
D
Electromagnetic waves
π Explanation: In longitudinal waves, such as sound waves, the particles of the medium move in the same direction as the wave propagates, creating areas of compression and rarefaction.
Q5
What is the speed of light in a vacuum?
π‘ Show Hint
π‘
This is a fundamental constant in physics.
A
300,000 km/s
B
150,000 km/s
C
400,000 km/s
D
500,000 km/s
π Explanation: The speed of light in a vacuum is approximately 299,792,458 meters per second (often rounded to 3 x 10^8 m/s), and is a fundamental constant in physics.
Q6
What is the acceleration due to gravity on Earth?
π‘ Show Hint
π‘
This value is commonly approximated.
A
8.9 m/sΒ²
B
9.81 m/sΒ²
C
10.0 m/sΒ²
D
9.0 m/sΒ²
π Explanation: The acceleration due to gravity on Earth is approximately 9.81 m/sΒ², which affects how objects fall towards the Earth.
Q7
What is the relationship between frequency and wavelength in a wave?
π‘ Show Hint
π‘
Think about the wave equation.
A
They are directly proportional
B
They are inversely proportional
C
They are unrelated
D
They are equal
π Explanation: The relationship between frequency (f) and wavelength (Ξ») is given by the equation v = fΞ», where v is the speed of the wave. As frequency increases, wavelength decreases, and vice versa.
Q8
What is the unit of force in the International System of Units (SI)?
π‘ Show Hint
π‘
Think about Newton's second law of motion.
A
Joule
B
Newton
C
Pascal
D
Watt
π Explanation: The unit of force in the SI system is the Newton (N), which is defined as the force required to accelerate a one-kilogram mass by one meter per second squared.