Lesson 1
Lesson 1 cont.
Lesson 2
Lesson 2 cont. and 3
Lesson 3
100
What is a push or pull that acts on an object?
Force
100
Newton's first law is also known as the principle of ____?
intertia
100
These have few or no moving parts.
Simple machines
100
Name 4 of the 6 simple machines.
lever, wheel and axle, pulley, inclined plane, wedge, screw
100
Like poles ____________
repel
200
What is a change in the speed or direction of an object?
Acceleration
200
What is Newton's first law?
An object at rest will stay at rest and an object in motion will stay in motion until a force acts upon it.
200
True or false. I tried really hard to lift a 300 lb weight, but it didn't move. I did work.
False
200
What is an advantage of using an inclined plane to raise a box onto a truck?
You need to use less force to raise the box
200
Opposite poles __________
attract
300
What is the force that causes objects with mass to be attracted?
Gravity
300
What is Newton's second law?
An object will accelerate only when an unbalanced force acts on it.
300
Work is measure in?
a Newton-meter or joule
300
What is a disadvantage of using an inclined plane to raise a box onto a truck?
You have to travel a father distance.
300
True or false. Dropping a magnet or heating it up causes it to become weaker
true
400
A newton is?
force required to accelerate a mass of 1 kg at 1 m/s, how we measure force
400
True or false. When playing tug-of-war, one side will win because that side had more force than the other
True, it has to do with how much force you put into something, not simply how much you weigh.
400
What does a simple machine do to the force applied to it?
Changes the amount of force needed, the direction, or both.
400
How do you make the strength of an electromagnet increase?
More coils, stronger battery (produces more heat, also only lasts as long as the battery)
400
What are some examples of things that use electromagnets
Doorbells, trains, electric motors, very strong magnets
500
What is motion?
A change in an objects position
500
If I am going north at 30 mph and my friend is going south at 30 mph, tell me about our speeds and velocities.
The speeds are the same but the velocities are different because you are going in different directions
500
How does a simple machine help or change the force in a single fixed pulley?
Changes the direction applied to the force
500
What causes something to be magnetic?
All of the electrons lining up in the same direction
500
What causes auroras?
Electrons form space (sun) colliding with oxygen and nitrogen in our atmosphere. They give up their energy and put out a light.
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