Motion
Newton's Laws
Electricity
Graphs
EXTRA: Magnets
100
On a velocity-time graph, how is constant speed represented?
With a straight horizontal line
100
Every Action has an equal and opposite reaction. Which of Newton's laws is this?
Newton's 3rd law
100
What 2 factors affect electric and magnetic force?
Distance and amount of charge
100
Which car was pushed with the greatest force?
Car 3
100
Can magnetic fields pass through objects? Explain.
Yes, it just weakens the force.
200
You are riding your bike. You look to your left and see a gas station as you pass by. Relative to what would the student have motion. Relative to what, would the student not show motion?
1. motion from the gas station
2. no motion from student and bike
200
The book on your desk is exerting a force of 10N downward. What force and direction is the desk exerting back?
10N upwards
200
Name three examples of non contact forces.
magnetism, static electricity, and gravity
200
Use the graph to explain what happened to the car between 2-3 hrs.
It showed no motion.
200
How can you increase the strength of an electromagnet?
by increasing voltage of the battery
300
What would be a pair of vectors that describe motion from my desk in the back to the front entrance door of my room?
16ft forward and 18 ft to the right
Answer accepted IF they include direction AND distance or speed.
300
Fill in the following two blanks about Newton's 3rd Law:
______ causes a moving object to stop moving.
A person applies force to an object, and the object exerts a _______ back on the person.
friction
force (equal and opposite)
300
When you rub a balloon on your hair, what causes the hairs to stick up?
electric force; the strands become charged and attract to the opposite charged balloon.
300
Which graph shows the bicycle moved at its highest speed?
Graph D
300
What is an electromagnet?
a magnetic field created by electric current
400
On a distance time graph, would my line be less steep or more steep to show less force was applied to the object in motion? Why?
Less steep because the forward motion is less, so less distance is covered.
400
If I am doing an experiment to see if mass affects velocity, what should my independent variable be in my test?
Mass- independent
Velocity-dependent
Force stays the same throughout.
400
Electric current flowing through a conductive wire, wrapped around a nail can create a magnetic field in something called
an electromagnet
400
What do the blue and red line represent on this graph?
action and reaction forces
400
How can you test and measure which generator creates the most electrical current?
compare the brightness of lightbulbs connected to each generator
500
Which color duck has constant speed?
The Green duck has constant speed on a distant time graph.
500
You are wanting to test Newton's 2nd law of motion, to see if mass effects how an object moves. If you first test a 5g weight on a toy car with a force of 5N, what kind of mass and force would need to be in your second test?
Different mass with same force applied
500
Name and describe two types of circuits.
Series circuit- one path
Parallel circuit- more than one path
500
In which trial will the the car move to the right?
Trial 3
500
What can be used as a source of mechanical energy in the construction of a generator?
a spinning turbine