Forces in Action Challange
What type of force pulls objects toward Earth’s center?
Gravity
What is motion?
A change in position over time.
When forces are balanced, what happens to an object’s motion?
It stays still or moves at a constant speed.
What is the variable you change on purpose in an experiment called?
Independent Variable
Name one tool scientists use to measure motion.
ruler, meter stick, stop watch, etc.
What type of force slows objects down when surfaces rub together?
Friction
What tool can measure how far something moves?
A ruler or measureing stick
When forces are unbalanced, what happens to an object?
What is the variable you measure or observe in an experiment called?
Dependent Variable
A student tests how the type of surface affects how far a toy car rolls. What is the independent variable?
Type of surface
Applying a force that makes aa shopping cart go away from you is an example of what type of force?
Push
If an object is moving in a straight line and no force acts on it, what will happen?
It will keep moving in the same direction.
A book sitting on a table is an example of what kind of force?
Balanced force.
What do you keep the same to make the experiment fair?
Controlled Variables
A student tests how the type of surface affects how far a toy car rolls. What is the dependent variable?
Distance the car rolls
What happens to an object when a stronger force is applied?
It moves faster and further.
When a ball rolls down a hill, which force causes it to speed up?
Gravity
A soccer ball being kicked is an example of what kind of force?
Unbalanced force.
In an experiment testing how ramp height affects speed, what is the independent variable?
Ramp Height
What type of force do magnets use to pull or push objects?
Magnetic force
Which type of force is it when an attraction or repel happens to things that are steel, iron, nickel, or cobalt?
Magnetic
What happens to the direction of motion when you apply force from a different angle?
The direction of motion changes.
What happens when two people push a box with equal force from opposite sides?
The box does not move.
In an experiment testing how ramp height affects speed, what is the dependent variable?
Speed of the object
Explain how unbalanced forces affect motion (3 things).
They cause a change in motion, speed, or direction