Force and Motion Flashcards
State the units of distance, time and speed
distance: km/m
time: h/s
speed: km/h or m/s
What is the equation for speed?
v=d/t
What does a constant speed on a graph look like in math terms?
linear
What does a acceleration on a graph look like in math terms?
exponential going up
What does a deacceleration on a graph look like in math terms?
a negative exponential
Define force
A push or a pull on an object that can either be contact or non-contact.
How can force influence a object?
accelerate , decelerate , stop , start moving , change direction , change shape , or turn.
What are examples of contact forces?
friction, air resistance, support, contact, tension and lift
List examples of non-contact objects
gravity, magnetism, and electric forces (electricity)
Define friction
Friction is the opposing force preventing objects from sliding past each other. It increases as speed increases.
How does force and mass affect acceleration?
Acceleration of a body is directly proportional to the net force, and inversely proportional to the mass.
can be calculated by a=F/m (acceleration = force/mass)
e.g. A more massive body requires a greater force to accelerate it than a less massive body.
When force is zero…
… then the acceleration is zero.
