PHYSICS Flashcards
What is the formula for calculating speed?
Speed = Distance / Time
True or False: Acceleration is the rate of change of velocity.
True
Fill in the blank: The unit of force in the SI system is the ______.
Newton
What is the principle of conservation of energy?
Energy cannot be created or destroyed, only transformed from one form to another.
Which law states that for every action, there is an equal and opposite reaction?
Newton’s Third Law of Motion
What is the formula for gravitational potential energy?
Potential Energy = mass × gravitational field strength × height
True or False: The total momentum of a closed system remains constant.
True
What is the definition of work in physics?
Work is done when a force causes displacement.
Multiple Choice: What is the unit of power? A) Joule B) Watt C) Newton
B) Watt
What is the formula for calculating kinetic energy?
Kinetic Energy = 0.5 × mass × velocity²
Fill in the blank: The speed of light in a vacuum is approximately ______ meters per second.
299,792,458
What is the difference between scalar and vector quantities?
Scalar quantities have magnitude only, while vector quantities have both magnitude and direction.
True or False: The acceleration due to gravity on Earth is approximately 9.81 m/s².
True
What is a wave?
A wave is a disturbance that transfers energy through space or matter.
Multiple Choice: Which type of wave requires a medium to travel? A) Electromagnetic B) Sound C) Light
B) Sound
What is the law of reflection?
The angle of incidence is equal to the angle of reflection.
Fill in the blank: The formula for density is ______.
Density = Mass / Volume
What is the significance of absolute zero?
Absolute zero is the theoretical temperature at which a system’s entropy reaches its minimum value.
True or False: An object in free fall experiences no air resistance.
True
What are the three types of heat transfer?
Conduction, convection, and radiation.
Multiple Choice: What is the primary force that keeps planets in orbit around the sun? A) Magnetism B) Gravity C) Friction
B) Gravity
What is the principle of superposition in waves?
When two or more waves overlap, the resultant displacement is the sum of the individual displacements.
Fill in the blank: The unit of electric current is the ______.
Ampere
What is Ohm’s Law?
Voltage = Current × Resistance
True or False: A conductor allows electricity to flow easily through it.
True
What is the definition of frequency?
Frequency is the number of cycles of a wave that occur in a unit of time.
Multiple Choice: What type of lens is used to converge light rays? A) Concave B) Convex C) Cylindrical
B) Convex
What is the formula for pressure?
Pressure = Force / Area
Fill in the blank: The phenomenon of light bending when it passes from one medium to another is called ______.
Refraction
What is the difference between mass and weight?
Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.
True or False: All forms of energy can be converted into mechanical energy.
False
What is the unit of energy in the SI system?
Joule
Multiple Choice: Which of the following is a non-renewable energy source? A) Solar B) Wind C) Coal
C) Coal
