Force
What is a force?
A push or pull on an object
What is friction?
A force that opposes motion between two surfaces in contact.
What is a lubricant?
A substance used to reduce friction between surfaces.
What is motion?
The change of position of an object.
If I kick a ball, what can I predict will happen?
The ball will move in the direction I kicked it.
What is magnetism?
A force that can attract or repel certain materials, like iron.
Can you name something that uses force in everyday life?
Opening a door, pushing a shopping cart, etc
What can you feel when you slide your hands on a rough surface?
Friction
Can you name a common lubricant?
Oil or grease.
What do we call the path an object takes when it moves?
A trajectory.
What factors can affect how far a ball rolls when I throw it?
The force of the throw and the surface it rolls on.
What do we call the ends of a magnet?
Poles (north and south).
What happens to an object when a force is applied?
It can start moving, stop moving, or change direction.
Name a situation where friction is helpful.
Walking, driving a car, etc
What happens when you use lubricant on a squeaky door?
It reduces friction and makes the door move smoothly.
What is the opposite of motion?
Rest
If two cars are racing, how can we predict which one will win?
By looking at their speed and how fast they accelerate.
What happens if you bring two magnets close together?
They may attract or repel each other.
True or False (Must Explain): A force can only be applied by living things
False (forces can be applied by non-living things too)
What happens if there is no friction?
Objects would slide easily and not stop.
Why do machines need lubricants?
To help them work better and last longer by reducing friction
If a car is moving at a constant speed, what does that mean?
It’s moving at the same speed without speeding up or slowing down.
What happens when you push two objects with different weights?
The lighter object will move farther than the heavier one with the same push.
Can you name something in your house that uses magnets?
A refrigerator door or a magnetic toy.
What is gravity?
A force that pulls objects toward each other, like Earth pulling us down
What are two types of friction?
Static friction and kinetic friction.
What might happen if you don’t use lubricant on a bicycle chain?
The chain may rust or break because of too much friction.
How can we describe motion?
By its speed and direction.
If a skateboarder pushes off the ground, what will happen?
They will start moving forward.
How does Earth act like a magnet?
Earth has a magnetic field that affects compasses and protects us from solar winds.