Magnetic Fields
This invisible region around a magnet explains why paperclips can jump without being touched.
A magnetic field
Wrapping more coils of wire around a nail increases this property of the electromagnet.
Its strength
A soccer ball that doesn’t move until it’s kicked is an example of this law of motion.
Newton’s First Law (Inertia)
The Moon stays in orbit around Earth because of this non-contact force
Gravity
Inertia depends directly on this property of an object:
Mass
The direction and distance a magnetic field reaches can be shown using these tiny objects.
Iron filings
Doubling the number of batteries in a circuit has this effect on the electromagnet’s pull.
It becomes stronger
Two cars crash head-on and both stop. This demonstrates that the forces they applied were this:
Equal and opposite
Electric and magnetic forces can act a distance. Two objects with like charges/poles will do what?
Repel
The force that opposes motion when two surfaces rub against each other is called this:
friction
This happens to the strength of a magnet as two magnets are moved farther apart.
The strength decreases
Turning the electric current on and off in a wire coil will make the magnetic field do this.:
Appear and disappear OR turn on/off
A tug-of-war with 60 N to the right and 45 N to the left creates this net force and in which direction
15 N to the right
If you push two objects of different masses with the same force, this smaller one accelerates faster. This can be explained by which law?
Newton's 2nd law
Stephanie and Trevor are experimenting with magnets and paper clips. As they move the magnets farther apart, what happens?
Less paperclips/force is weaker
A paperclip jumps toward a magnet without contact. This shows that forces can do this:
Act without touching
Increasing the thickness of the wire or reducing resistance will make the electromagnet do this:
become stronger
If you push two objects of different masses with the same force, this one accelerates faster
The object with less mass
An object is moving at a constant speed in a constant direction. What can you assume about the forces acting on the object?
They are balanced
An object's motion has changed, what can we assume about the force acting on it?
The force acting on it was unbalanced OR the force applied was able to overcome the object's inertia
The closer the magnetic field lines are drawn, the ______ the field is in that region.
stronger
Amy and Grayson are experimenting with an electromagnet in science class. If they place a paperclip near (but not touching) their electromagnet, what would most likely happen as they add more wire turns?
more paperclips
A baseball bat and ball apply equal and opposite forces during a hit, demonstrating this of Newton’s laws.
Newton's 3rd Law
The strength of a magnet’s pull decreases as this increases
Distance
Christine and Will are on the bumper cars at Carowinds, each going at different speeds, when they crash into each other! During the crash, both bumper cars push on each other with the same force. Which car would experience a bigger change in motion?
Christine's car has a total mass of 156 kg
Will's car has a total mass of 202 kg
Christine's