Balanced vs. Unbalanced Forces
This type of force keeps an object moving the same or staying still.
What are balanced forces.
This is what you calculate when you divide distance by time.
What is speed.
A flat (horizontal) line on a distance-time graph means this.
What is the object is not moving?.
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A car travels 60 meters in 5 seconds. Find its speed.
What is 12 m/s?
If one side pulls harder than the other, this type of force occurs.
What are unbalanced forces?.
To calculate average speed, you need these two measurements.
What are distance and time.
A steeper line on a graph shows this about speed.
What is faster speed.
The variable you measure or observe.
What is the dependent variable.
Two forces act on an object: 15 N right and 10 N left. Net force?
What is 5 N to the right.
When forces are unbalanced, this happens to motion.
What is a change in motion (speed or direction).
If an object travels the same distance every second, its speed is this.
What is constant speed.
A curved line on a distance-time graph usually means this.
What is changing speed (acceleration)
These must stay the same for a fair test.
What are controlled variables.
What must happen to forces for an object at rest to start moving?
What is they must become unbalanced.
wo people push a box with equal force in opposite directions. The net force is this.
What is 0 N.
If a graph of distance vs. time is a straight line, the motion is this.
What is constant speed.
An object travels 10 meters in 2 seconds and 20 meters in 4 seconds. What does this tell you about its speed?
What is the speed is constant.
If you add weight to a car in an experiment, this is the independent variable.
What is mass?
Why does an object held in your hand not fall, even though gravity pulls on it?
What is the upward force from your hand balances gravity.
To stop a moving object, the forces must become this.
What are balanced forces?
This happens when an object’s speed increases, decreases, or direction changes.
What is acceleration?.
If the line on a graph gets steeper over time, the object is doing this.
What is speeding up.
Why is it important to keep the ramp height the same when testing how added weight affects a car’s speed?
What is to make sure only the mass is changing (fair test).
A student pushes a box with 25 N to the right while friction pushes with 25 N to the left. What will happen to the motion of the box, and why?
What is the box will not change its motion (it will stay at rest or move at constant speed) because the forces are balanced and the net force is 0 N?