Inertia
Mass vs Weight
Newton's Law
Before Newton
Miscellaneous
100
What is a measure of an object's inertia?
The object's mass.
100
_____ is the SI unit of weight.
newtons
100
Newton's 1st Law of Motion says that an object at rest will do what?
Stay at rest.
100
He reasoned that the simplest way to interpret astronomical observations was to assume that Earth and the other planets moved around the Sun.
Nicolaus Copernicus
100
What is the mass of a 500-N bicycle?
51 kg (or about 50 kg)
200
Which scientist was the first to come up with the concept of inertia by rolling balls down ramps?
Galileo.
200
______ is the SI unit of mass.
kilograms
200
What objects does Newton's first law apply to?
All of them.
200
This Greek scientist studied motion and divided it into these two types.
natural motion and violent motion
200
What is the net force on a 900-N skydiver falling with 350 N of air drag?
550 N down.
300
Inertia is an object's resistance to a change in _______.
motion.
300
What is the weight of a 60-kg person on Earth?
589 N (About 600 N).
300
What is the difference between Newton's "1st Law of Motion" and the "Law of Inertia"?
There is no difference.
300
His was placed under house-arrest for his support Copernicus, which led to his formulations on motion - inertia.
Galileo Galilei
300
Which of the following is not a country in Africa?
Burundi, Bahrain, Burkina Faso, Botswana
Bahrain (it's in the Middle East)
400
How much force is required to keep an object moving?
No force is needed.
400
You are on earth (gravity is 9.8 m/s2) and have a 45-kg dog. What is your dog's mass when it is moved to the moon, where gravity is 1.6 m/s2
It's still 45 kg.
400
What common force is the "enemy" of Newton's first law?
Friction.
400
T or F
Prior to the work done my Isaac Newton, there was no gravity since it had not been explained.
FALSE
Gravity still existed !
400
Who is Stephani Germanotta?
Lady Gaga.
500
Why do you have to keep pedaling your bicycle to stay in motion?
To overcome friction.
500
What is the weight on Earth of something that weighs 20 N on the Moon ?
Gravity on the moon is 1/6 the gravity on Earth !
123 N (about 120 N).
500
If someone were going to hit your head with a hammer, would it be better to have a hard brick or a big soft pillow on your head? Why?
A brick, because it has more mass and will be harder to move.
500
A caveman is dragging his wife home. If he is walking straight and at a constant speed, and is pulling with 500 N of force, what is the net force on his wife?
Zero, since she is moving at a constant speed in a straight line.
500
STATE what is Isaac Newton's first law?
An object in motion will stay in motion unless it interacts with an outside force, the same applies for an object at rest.