Electromagnetism
Forces & Fields
Newton's Laws / Motion
Random
Random
100
What simple device can you create by wrapping wire around a nail and connecting it to a battery?
What is an electromagnet
100
What type of force can act on an object without touching it?
What is a non-contact force
100
Which of Newton's laws explains why you move backward when you push off a wall? And why?
What is Newton's Third Law? For every action there is an equal and opposite reaction.
100
A student places a piece of cardboard on a glass and a coin on the cardboard as shown in the image.
What will likely happen to the coin if the student QUICKLY removes the cardboard by sliding it to the right? Which of Newtons Laws does this relate to?
The coin will fall into the glass because objects tend to resist any change in motion.
Newtons 1st Law
100
Generators turn ___________ energy into ____________ energy.
mechanical into electrical
200
What two things can increase the strength of an electromagnet?
What are increasing the number of coils and increasing the electric current
200
Give an example of a field that exists between two objects not in contact.
What is a magnetic field, electric field, or gravitational field?
200
What happens to an object when unbalanced forces act on it?
What is it changes motion (accelerates)?
200
What can be concluded about the amount of coils and number of paper clips attracted?
The strength of an electromagnet increases as the number of coils increases.
200
Electric motors convert _________ energy into ____________ energy.
Electrical energy into mechanical energy
300
What role does a generator play in producing electricity?
What is converting mechanical energy into electrical energy using electromagnetic induction
300
How can we provide evidence that a magnetic field exists if we can’t see it?
What is observing the movement of objects like iron filings or a compass needle?
300
If two students push a box from opposite sides with equal force, what will happen?
What is the box won’t move because the forces are balanced
300
Examine the diagram of the four forces acting on an object.
If the object is not in motion, what is the value of the force X?
50 N
300
The graph shows the velocity of a cyclist during a 3-hour bike ride.
Which statement describes the cyclist's motion?
A : He decelerated rapidly at the end of the bike ride.
B : He accelerated rapidly at the end of the bike ride.
C : His velocity was constant during the 3-hour bike ride.
D : His direction changed 3 times during the bike ride.
B : He accelerated rapidly at the end of the bike ride.
400
Why does a motor spin when an electric current flows through it?
What is the interaction between magnetic fields and electric currents creating a force
400
What happens to the gravitational force between two objects when the distance between them increases?
What is the force decreases
400
What is the equation for Newtons 2nd Law. Hint - it has to do with Force.
Force = Mass x Acceleration
400
Which planet has the greatest gravitational pull and why?
Jupiter has the greatest gravitational force because it has a larger mass.
400
The graph shows the motion of a car during the four segments (P, Q, R, and S) of its 120-minute journey.
What can be concluded about the motion of the car from the graph?
A : The car moves faster in segment Q than in segment S
B : The car moves faster is segment R than segment P
C : The car moves faster in segment Q than in segment P
D : The car moves faster in segment S than in segment R
B : The car moves faster is segment R than segment P
500
You design a motor that’s weak. Based on your testing, what modifications might you make to improve its performance?
What is adding more coils, increasing current, or using stronger magnets
500
Draw a bar magnet, and the direction and design of the magnetic field lines. Label all appropriate parts of the magnet.
See drawings.
500
Draw a free body diagram of two people pushing a refrigerator in opposite directions. Person A is pushing with 20N to the right - Person B is pushing with 80N to the left. What is the Net force?
See drawing. Net Force = 60N Left
500
John and his son are applying forces to move a box, as shown.
What are the magnitude and direction of the net force?
9 N West
500
A car leaves a parking lot, drives 200 meters to the north, turns around, drives 200 meters south back to the same parking lot. What is the cars displacement?
0 Meters