Force/Net Force
A push or pull
What is Force?
Friction acts to ________ motion.
What is resist?
Energy cannot be __________ or destroyed.
What is created?
All magnets have a ____________ pole and a ___________ pole.
What is North and South?
Earth has a magnetic field.
What is TRUE.
The unit for measuring force
What is a Newton?
Which scenario has the most friction?
-soccer ball rolling on a gym floor
-soccer ball rolling on pavement
-soccer ball rolling on grass
What is soccer ball rolling on grass?
___________ energy is the energy of movement.
What is kinetic?
The north pole ____________ the south pole.
What is attracts?
True or False:
A magnet has an invisible magnetic field that extends beyond the magnet.
What is TRUE.
When forces are balanced, the net force is
What is 0?
True or False:
Rougher surfaces create more friction, so more force is needed to move something over the rougher surface.
TRUE
A child running is an example of:
-Kinetic energy
-Potential energy
If you cut a magnet in half, you have two smaller magnets - each with its own North and South pole.
What is TRUE?
A student touched a nail to a magnet, the nail picked up a paper clip and the paper clip picked up a screw. This is an example of a ________ _________.
What is temporary magnet?
Student A pushed on a cart with a force of 300 N. Student B pushed on the other side of the cart with 500 N. Which direction did the cart go? What was the Net Force?
What is toward student A, and 200 N.
True or False:
To stop an object that is in motion on a frictionless surface, you stop applying force.
FALSE
A motionless iron object in the magnetic field of a magnet may be said to have _________ energy.
What is potential?
How does a compass help to find Earth's magnetic north?
What is the compass needle is magnetic (has iron in it) which is attracted to the magnetic pole.
When magnetic fields are added together. the force of attraction ______________.
When magnets are farther apart the force of attraction __________.
What is increases and decreases?
A student pushes a cart against a wall exerting 500 N of force. The cart doesn't move. How do you explain what happened?
What is the wall pushes back with 500 N of force?
An air hockey table uses a cushion of air to increase the speed of play because it _______ _______ between the table and the puck.
What is lowers the friction?
When a magnet causes a paper clip to move, its an example of ____________ energy being changed into ______________.
What is potential/kinetic?
Iron filings on a plate move into a distinct pattern when gently shaken above a magnet. What do the shapes represent?
What are the magnetic field lines?
A student has two magnets. One is on top of the table and the other in their hand. They put their hand under the table and the magnet on the top begins to move. This proves that ...
What is the force of magnetism goes through some materials?