What is the difference between distance and displacement?
Distance is the length between two points while displacement is the distance between points in a specific direction
What is the gradient of a straight horizontal line in a DISTANCE-TIME graph?
The gradient of a uniformly increasing VELOCITY-TIME graph is...
How do you find the distance under a graph?
Find the area of the shapes under the graph
Triangle = 1/2 (bxh)
Rectangle = l x w
Name 3 examples of a scalar quantity
Any 3: Mass, Time, Length, Area, Volume, Temperature etc.
Name 3 examples of a vector quantity
Any 3: Velocity, acceleration, Force, weight, displacement
What is a scalar quantity?
A quantity that has only magnitude
What is a vector quantity?
a quantity that has both magnitude and direction
When adding vectors, left/west and down/ south are positive or negative?
When adding vectors, right/east and up/north are positive or negative?
What is a force?
a push or pull on an object
Name 3 examples of contact forces
Any 3: normal force, applied force, air resistance, tension, friction, weight, friction
Name 3 examples of non-contact forces
Gravity, magnetic force, electrical force
State 2 effects of forces
Any 2: Change in speed, Change in state of motion, Change in shape/size, Change in direction
Name 2 advantages of friction
Allows vehicles to brake
Allows us to walk/run
Name 2 effects of friction
Wear and tear
An example of a simple machine is
Choose any: wheel, lever, pulley
What formula is associated with Newton's 2nd law?
F = ma
What does directly proportional mean?
Directly proportional means that an increase in one variable results in an increase in the other variable, or a decrease in one variable results in a decrease in the other variable.
In Newton's 2nd law, what direction does acceleration act in?
Acceleration acts in the same direction as the force
State Newton's third law of motion.
For every action there is an equal but opposite reaction
What 2 conditions are necessary for equilibrium to occur?
Net force must be equal to 0
Sum of all moments must be equal to 0
What is the formula for moments?
Moment = force x distance
the ability to do work
Define kinetic energy
the energy an object has due to its motion