Physics Flashcards
What is the unit of force?
Newton (N)
True or False: Energy can be created or destroyed.
False
Fill in the blank: The formula for calculating speed is _____ = distance / time.
speed
What is the law of conservation of energy?
Energy cannot be created or destroyed, only transformed from one form to another.
What is the formula for calculating gravitational potential energy?
GPE = mass × gravitational field strength × height
Multiple Choice: Which of the following is not a type of energy? A) Kinetic B) Thermal C) Time D) Potential
C) Time
What is the SI unit of power?
Watt (W)
True or False: An object in motion will remain in motion unless acted upon by an external force.
True
What is the formula for calculating acceleration?
Acceleration = (final velocity - initial velocity) / time
Fill in the blank: The resistance in a circuit is measured in _____
Ohms
What is Ohm’s Law?
Voltage = Current × Resistance
Multiple Choice: Which particle has a positive charge? A) Electron B) Proton C) Neutron D) None of the above
B) Proton
What is the definition of a scalar quantity?
A quantity that has magnitude only, without direction.
What is the definition of a vector quantity?
A quantity that has both magnitude and direction.
True or False: The speed of light in a vacuum is approximately 300,000 km/s.
True
What is the formula for calculating work done?
Work = Force × Distance
Fill in the blank: The total momentum of a closed system remains _____
constant
What is the principle of moments?
For an object to be in equilibrium, the clockwise moments about a point must equal the counterclockwise moments.
What is the difference between speed and velocity?
Speed is scalar and only considers magnitude; velocity is vector and includes direction.
Multiple Choice: Which of the following forms of energy is associated with motion? A) Kinetic B) Chemical C) Nuclear D) Electrical
A) Kinetic
What is the formula for kinetic energy?
KE = 0.5 × mass × (velocity)^2
True or False: An electric current can flow through an insulator.
False
What is the definition of frequency?
The number of cycles of a wave that pass a point in one second.
Fill in the blank: The unit of frequency is _____
Hertz (Hz)
What is the formula for calculating the period of a wave?
Period = 1 / Frequency
Multiple Choice: Which type of wave requires a medium to travel through? A) Electromagnetic B) Sound C) Both A and B D) Neither A nor B
B) Sound
What is the definition of refraction?
The bending of a wave as it passes from one medium to another.
