Newton's Laws and Forces Flashcards
Define Mass
The amount of matter making up an object
What is weight?
The gravitational field pulling on an object’s mass
Potential units of gravity
M/s^2 or N/M^2
What is Newton’s First Law?
An object remains stationary or co to yes in motion with a constant speed unless acted upon by a resultant force (RF) to
What is Newton’s Second Law?
The acceleration of an object is proportional to and in the direction of the resultant force applied to it, and inversely proportional to its mass.
Resultant force (RF) = mass (kg) x acceleration (M/s^2)
What is inertia?
It is how difficult it is to change the state of motion of an object, affected by its mass and velocity
What is the RF at terminal velocity?
The RF is 0
What is Newton’s 3rd Law?
In an interaction between 2 objects, of object A exerts a force on object B then object B will exert an equal and opposite force on Object A
What are the 3 laws of Newton’s 3rd Law?
1) The 2 forces in an interaction park Act on different objects
2) The 2 forces are of equal size and a t in opposite direction
3) The 2 forces are always the same type, for example, they will both be a graviton also force.
How is a car made aerodynamic?
1) the front has been ‘raked’ at angle to improve aerodynamics + reduce air resistance
2) bottom of coach lower to ground and the wheels are more enclosed by the wheel arches, improves fuel economy as coach is more aerodynamic
3) edges of outer surface of coach are all rounded
4) Tyres designed to ensure a balance between grip + rolling resistance -> improves fuel economy
How is a car made more efficient?
Use cells to power vehicles -> less energy wasted than a fuel car
Position of cells mean mass is distributed evenly throughout the vehicle -> means that all of car tyres get ‘worn’ at an even rate, prevents rolling resistance
Move the height and of the body of the vehicle -> wheels are enclosed by wheel arches which improves aerodynamics
Quite when accelerating -> less energy wasted as sound so can be used to power the car
