1st half of physics paper 1 gcse Flashcards
(20 cards)
What is the prefix for nanometer?
n
Used in measurements like atomic diameter.
What is the conversion factor from kilometers to meters?
1 km = 1000 m
This factor is essential for converting larger prefixes to base units.
What should you exclude when calculating the mean?
Anomaly
Anomalies can skew the mean value.
How do you calculate the mean of a set of numbers?
Sum of all values divided by the number of values
E.g., for values 138, 144, 136, 141, the mean is calculated by (138 + 144 + 136 + 141) / 4.
What is the correct answer for the area of a table measuring 2.4m by 1.7m rounded to significant figures?
4.1 m²
Rounding must consider the significant figures of the measurements.
What is a vector?
A quantity that has both magnitude and direction
Examples include velocity and acceleration.
What is a scalar?
A quantity that has only magnitude
Examples include mass and temperature.
What does Newton’s 1st law state?
An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net force
This law emphasizes the concept of inertia.
What is the formula for calculating acceleration?
a = (v - u) / t
Where v = final velocity, u = initial velocity, t = time.
What is the formula for calculating distance using a velocity-time graph?
d = area under the graph
This represents the total distance covered over a time interval.
What is Newton’s 2nd law?
F = ma
This law relates force, mass, and acceleration.
What is centripetal force?
The resultant force acting towards the center of a circle during circular motion
Essential for maintaining circular paths.
What is the relationship between mass and acceleration according to Newton’s 2nd law?
As mass increases, for a constant force, acceleration decreases
This illustrates the inverse relationship.
What is momentum?
Momentum = mass x velocity
It is a vector quantity indicating the quantity of motion.
What is thinking distance?
Distance traveled from seeing a hazard to the moment of reaction
Influenced by factors like speed and reaction time.
What is braking distance?
Distance traveled from when brakes are applied to when the vehicle stops
Various factors like road conditions can affect this distance.
What is the formula for calculating kinetic energy?
KE = ½ mv²
Where m is mass and v is velocity.
What does the Law of Conservation of Energy state?
Total input energy = Total output energy
Energy can only change forms, not be created or destroyed.
What are the three ways energy can be stored?
Chemical potential, Elastic potential, Gravitational potential
These represent different energy storage mechanisms.
What happens to wasted energy?
It is dissipated as heat or other non-useful forms
This often occurs in systems like light bulbs.
