5) Forces Flashcards
What is acceleration, and how is it different from velocity?
- Define acceleration
Acceleration is the rate of change in velocity
*Define velocity briefly
Velocity is speed with any given direction
*Compare
Acceleration focuses on the object’s speed and direction changes over time while velocity focuses on the object’s speed and direction changes at a specific moment of time.
What is the formula to calculate acceleration when you know the initial and final velocities and the time taken for the change in velocity?
a=iv-fv/t
Explain the concept of negative acceleration (deceleration) and provide an example.
- Define negative acceleration
Negative acceleration is the opposite of acceleration, it is when the object has slowed down. - Example:
A car has slowed down from moving at 60m/s^2, this process is called deceleration.
How does the increased mass of an object affect its acceleration when a force is applied to it?
Mass is inversely proportional to acceleration so it will slow down if you increased it.
How does increased air resistance affect the acceleration of falling objects?
Acceleration will slow down due to increased air resistance, eventually it will balance out and the object will reach terminal velocity. Where the object will have 0 acceleration.
If a 100 g (0.1 kg) ball experiences an acceleration of 20 m/s² when a force is applied, what is the magnitude of the force?
2000N
A 500 kg car experiences an acceleration of 2 m/s² when a force is applied. Calculate the magnitude of the force.
1000N
If you increase the force applied to an object while keeping its mass constant, what happens to its acceleration, according to the formula F=ma?
It will have greater acceleration because force and acceleration are directly proportional.
Explain how Newton’s second law of motion, expressed as F=ma, relates to the concepts of force, mass, and acceleration.
According to Newton’s second law, force and acceleration are proportional while acceleration and mass are inversely proportional. So that means the more force an object has it will accelerate quicker assuming that they have the same mass. While its the opposite for an object with an increasing mass and same force. The acceleraiton would be slower.
How does a change in velocity affect an object’s motion, and how does it relate to acceleration?
When a velocity changes it either change direction or speed but whichever one it will still relate to acceleration because acceleration is the change of velocity over time.
What is a resultant force and how does it relate to motion?
A resultant force is the sum of all forces and it is required to change the motion of an object
What are the 4 motions?
Weight, support, drag/friciton/air resistance, thrust/forward/traction.
what are balanced and unbalanced forces?
Balanced force is when all forces are equal so it keeps the object stationary.
Unbalanced force brings the object to motion since they aren’t equal.
What happens when resultant force equal 0
Constant velocity and stationary
What happens when velocity does not equal 0
Acceleration, de-acceleration, changes direction.
