Journeys
A refecence point is
The start of the journey
For every action there is:
An equal and opposite reaction
A straight line (sloping up or sloping down) indicate:
Something moving at a steady speed
Gravity acts in this direction
Downwards
Displacement is the
Distance from home in a straight line
Forces always occur in
pairs
To show a balanced force the arrows on a free-body diagram must be the same
size
As the mass of an object increases:
The force of gravity increases
Distance is the:
length of the journey from the start
Opposite
A car travels 100km in 2 hours. What was his speed?
50km/h
The two variables (things) that affect or can change the gravitational force are:
Distance and mass
Distance and displacement are the same thing (T/F)
F
The arrows on a free-body diagram tell you the:
Size and direction of the force
A flat line on a distance time graph indicates:
That the object has stopped.
Balanced
If a person leaves home, walks 2000km and then walks back to where he started the distance covered will be 4000km. His displacement will be:
0km
An elastic collision is when the objects
Collide and do not stick together
A curved line indicates that:
The object is accelerating or decelerating
As distance increases between two objects the gravity
Decreases