Topic 2 - Forces And Motion - Newtons Second Law Flashcards
What is the formula for force?
F = ma
Where force is in Newtons (N), mass is in kilograms (kg), and acceleration is in meters per second squared (ms²)
How is weight measured?
Using a force meter or weighing scales
Weight is used to work out the mass of an unknown object.
What happens to weight with greater gravitational field strength?
Weight increases
The greater the gravitational field strength, the greater the weight.
What is circular motion?
An object moving in a circle with constant speed
The speed is constant, but the direction is always changing, resulting in a change in velocity.
Why is an object in circular motion considered to be accelerating?
Because the direction is always changing
Even though the speed is constant, the velocity changes due to direction change.
What is required for motion in a circle?
A force that supplies acceleration
This force is called centripetal force, directed towards the center of the circle.
What is centripetal force?
The force directed towards the center of the circle
It is responsible for keeping an object in circular motion.
What does inertial mass measure?
How difficult it is to change the velocity of an object
This includes changing the object’s velocity from rest.
Fill in the blank: Inertial mass is measured by _______.
inertial mass = force / acceleration
This relationship shows the dependence of mass on the force applied and the resulting acceleration.
