Motion & Graphs
This type of motion is shown by a straight line going up on a distance–time graph.
What is constant speed?
A push or a pull on an object.
What is a force?
Forces that cancel each other out.
What are balanced forces?
Motion can change in speed, direction, or this.
What is both?
True or false — an object moving at constant speed has no forces acting on it.
What is false?
On a distance–time graph, a steeper (goes up more quickly) line means the object is moving this way.
What is faster?
Gravity, magnetism, and electric force are examples of this type of force.
What are non-contact forces?
When forces are balanced, an object’s motion does this.
What is it does not change?
An object moving straight slows down. This part of its motion changed.
What is speed?
An object moving at a constant speed in a straight line has forces that are this.
What are balanced?
A flat (horizontal) line on a distance–time graph shows that an object is doing this.
What is not moving?
This force slows or resists motion between two surfaces that touch.
What is Friction?
When two forces are balanced.
What is it does not change?
A ball moving north is hit and begins moving east. This part of its motion changed.
What is direction?
A stopped ball starts rolling after being kicked because this happened.
What is an unbalanced force was applied?
Two objects travel for the same amount of time. The object with the steeper (goes up more quickly) graph has more of this.
What is speed?
This force slows or resists motion between two surfaces that touch.
What is friction?
When an object at rest starts moving, this type of force must be acting on it.
What is an unbalanced force?
A car speeds up and turns at the same time. These two changes occur.
What are speed and direction?
A distance–time graph shows constant speed, which tells you this about the forces.
What are the forces are balanced?
When a distance–time graph changes from a straight line to a steeper straight line, this happens to the object’s motion.
What is it speeds up?
A magnet pulls a paper clip without touching it, proving that this can still change motion.
What is a force?
Two students push a box in opposite directions, but one pushes harder, causing the box to move. This explains why.
What are unbalanced forces?
Objects only change motion when this happens to the forces acting on them.
What is the forces become unbalanced?
Even though it slows motion, this force is important because it allows control and prevents endless motion.
What is friction?