Newtons Laws Flashcards
What is force
Force is the push or pull of an object
What is a contact force
Forces that take place when objects interact with eachother
What is a Non contacts force
Forces that take place without objects interacting with eachother
Examples of contact forces
- air resistance
- tension
- friction
- normal force
What is an interaction pair and what are the rules
Interaction pairs are pairs of forces that are the same size and type, act in opposite directions and on different objects
What is Newton’s first law
An object at rest will stay at rest and an object in motion will stay in motion and at a constant velocity unless acted upon by an external force.
What is inertia?
Inertia is the tendency for motion to remain unchanged and could also apply to a motionless object
How do you find the resultant force?
F (force) = M (mass) x A (acceleration )
(N). (Kg). (M/s^2)
How do you find the inertial mass?
Inertial mass = resultant force / acceleration
What is inertial mass?
Inertial mass is the ratio of resultant force over acceleration
What is Newton the second law?
The net (resultant) force of an object is directly directly proportional to its acceleration
What is one Newton?
The force required to accelerate one kg of mass at one meter per second squared
What is Newton’s third law?
When two objects interact the forces they exert on each other are equal and opposite
How do you find the weight?
Weight = mass X gravitational field strength
What is the relationship between mass and weight?
If something has a mass of 1Kg, it has a weight of 10 newtons on earth
What is the definition of weight?
Weight is a force caused by gravity
What is mass?
Is the amount of substance within an object
What is momentum?
Momentum is the product of mass and velocity and is a vector
What is the equation for momentum?
Momentum = mass X velocity
Kgm/s. Kg. m/s
What is conservation of momentum?
As long as no external force is acting on the object the total momentum before the collision is equal to the total momentum of the object after the collision.
How to find force using momentum
Force = (final momentum - initial momentum) / time taken for change
N. Kgm/s. S
What is work done equal to?
Energy transferred
How to find work done
Work done = force X distance
(J). (N). (m)
What is the rule for work done?
Work done is always done against another force
What is power?
Power is the measure of how fast energy has been transferred
Equation for power
Power = work done / time taken
(J/s). (J). (s)
