Motion & Patterns
A change in position over time.
Motion
What are balanced forces?
Forces that are equal and opposite, so motion does not change.
What tool measures force?
A spring scale
What happens when you push harder?
The object moves faster or farther.
What is a simple machine?
A tool made of few parts that reduces/ changes the amount of force needed to do work.
Why is it important for scientists to find patterns in motion?
To predict future motion
What happens when forces are unbalanced?
Motion changes
What unit do we measure force in?
Newtons (N)
Are heavier objects easier or harder to move?
Harder to move.
How does a ramp help lift something heavy?
It makes lifting easier by spreading the work over a longer distance.
A toy car rolls 50 cm 3 times, what do you think would happen the next time if nothing changes?
It will roll 50 cm
If an object moves at a steady speed, are forces balanced or unbalanced?
balanced, because the motion is unchanging
Why does sandpaper need more force than tile?
Sandpaper creates more friction.
Do faster objects have more or less energy?
More energy
Does a ramp remove friction?
No. Friction is still there.
Why do scientists measure motion more than once?
To find patterns
Give a real-life example of unbalanced forces.
Kicking a ball, pushing a chair, a collision.
What makes an investigation a fair test?
Only one variable changes. Everything else remains the same.
If you double the force, what might happen?
The object may move faster or farther.
How does a pulley change force?
It changes the direction of the force.
You roll a car down a ramp. Each time you make the ramp steeper and the car goes farther. Why?
As the ramp gets steeper, the force of the car increases.
Two students push a box from opposite sides with equal force. What happens? Why?
The box does not move because the forces are balanced.
If a spring scale reads 6 N on carpet and 2 N on tile, what does that tell you?
Carpet has more friction because it needs more force to move the object
Why does a fast-moving bowling ball cause a bigger change in motion during a collision?
Because it has more energy due to its speed.
Why might someone use a ramp instead of lifting a box straight up?
It requires less effort force, even though the distance is longer.