Physics- Forces

Question	Answer
Displacement	Displacement is the distance travelled in a straight line. It has both a direction and a size.
Velocity	The velocity of an object is its speed in one particular direction.
Acceleration	The acceleration of an object is calculated from its change in velocity and the time taken
Force	The force of an object is also a vector as it has a size (measured in Newtons) and a direction.
Features of time graphs;Stationary	When an object is stationary, the line on the graph is horizontal.
Features of time graphs;Steady Speed	When an object is moving at a steady speed, the line on the graph is straight, but sloped.
Features of time graphs;Steepness	The steeper the line, the greater the speed of the object.
Features of time graphs;Return journey	Line representing the return journey slopes downwards.
Velocity-time graphs features;constant velocity	When an object is moving with a constant velocity, the line on the graph is horizontal.
;constant acceleration	When an object is moving with a constant acceleration, the line on the graph is straight, but sloped.
Velocity-time graphs features;steepness	The steeper the line, the greater the acceleration of the object.
Velocity-time graphs features;line sloping down	A line sloping downwards-with a negative gradient-represents an object with a constant deceleration-slowing down.

Resource summary

	Created by buckley_shannon about 10 years ago