a straight diagnal line shows constant speed
a horizontal line shows the stop
a positive correlation curve shows acceleration
the slope can be used to work out the speed
a straight line shows constant acceleration
a horizontal line shows stead speed
a positive corellation curve shows increasing acceleration
the slope can be sued to work out acceleration
For both graphs
use this equation to work out speed or acelleration :
vertical value / horizontal value
How do we make things speed up or slow down ?
When two objects interact, the forces they exert on eachother are equal and opposite.
The overall unblanced force is called the resultant force.
If the object isnt moving, its resultant force is zero and the force's effect on the object makes it stay at rest
If the object is moving and its resultant force is zero, the force's effect on the object is constant velocity.
If the object is moving with a non-zero resultant force in the same direction as the motion of the object, the force's effect on the object is accelerating
If the object moving with a non-zero resultant force in the opposite direction of the motion of the object, the force's effect on the object is deccelerating
If the resultant force is zero -
the object stays stationary if it wasnt moving
keeps on moving at the constant speed if it was moving
resultant force = mass x acceleration
(N) (kg) (m/s squared)
When a vehicle travels at a steady speed, the friction force and the drving force are balance .