Point Flashcards
(41 cards)
Define ‘velocity’
The speed of something in a given direction
Velocity is a vector quantity that includes both speed and direction.
What is ‘acceleration’?
The rate of change of velocity
Acceleration can be positive (speeding up) or negative (slowing down).
What does ‘force’ refer to?
An interaction that causes an object to change its motion
Force is measured in Newtons (N).
What is the difference between ‘mass’ and ‘weight’?
Mass is the amount of matter in an object; weight is the force of gravity acting on that mass
Weight can change with gravity, while mass remains constant.
Define ‘momentum’
The product of an object’s mass and its velocity
Momentum is conserved in closed systems.
What is ‘gravitational field strength’?
The force per unit mass experienced by a small test mass placed in a field
Measured in Newtons per kilogram (N/kg).
True or False: ‘Speed’ is a scalar quantity.
True
Speed does not have a direction, only magnitude.
Fill in the blank: ‘_______ is the distance traveled per unit time.’
Speed
Speed is often measured in meters per second (m/s).
List the scalar quantities mentioned.
- Speed
- Distance
- Time
- Temperature
- Volume
Scalar quantities have only magnitude, not direction.
What is a ‘vector’?
A quantity that has both magnitude and direction
Examples include velocity, force, and acceleration.
What does ‘displacement’ refer to?
The shortest distance from the initial to the final position
Displacement is a vector quantity.
Define ‘acceleration due to gravity’.
The acceleration of an object in free fall towards the Earth
Approximately 9.81 m/s² near the Earth’s surface.
True or False: ‘Mass’ is a vector quantity.
False
Mass is a scalar quantity.
What is ‘temperature’?
A measure of the average kinetic energy of particles in a substance
Measured in degrees Celsius (°C) or Kelvin (K).
Fill in the blank: ‘_______ refers to the amount of space an object occupies.’
Volume
Volume is typically measured in liters (L) or cubic meters (m³).
What is the term for the speed of an object in a specific direction?
Velocity
Velocity is a vector quantity that includes both speed and direction.
What is the term that describes the rate of change of velocity?
Acceleration
Acceleration is a vector quantity that indicates how quickly an object is speeding up or slowing down.
Which physical quantity is defined as the product of mass and velocity?
Momentum
Momentum is a vector quantity that represents the motion of an object.
Fill in the blank: The measure of the gravitational force acting on an object is called _______.
Weight
Weight is the force exerted by gravity on an object, typically measured in newtons.
What is the term for the strength or intensity of a magnetic field?
Magnetic field strength
Magnetic field strength is a measure of the magnetic force per unit length.
True or False: Scalar quantities have both magnitude and direction.
False
Scalar quantities only have magnitude, while vector quantities have both magnitude and direction.
What does the term ‘displacement’ refer to in physics?
The change in position of an object
Displacement is a vector quantity that refers to the shortest distance from the initial to the final position.
Fill in the blank: The amount of space an object occupies is called _______.
Volume
Volume is a scalar quantity typically measured in cubic units.
What is the relationship between mass and gravitational field strength?
Mass contributes to the weight of an object in a gravitational field
Gravitational field strength is the force of gravity acting on a unit mass.
