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How are gears used in real life? You can steal in 10 seconds.
Bikes, construction vehicles, etc.
What do you call a scientist that studies forces?
A physicist.
What is a unit of force called?
A Newton.
How much weight does 1 Newton produce?
About an apple.
Touch the table.
To lose 99 points.
How much pressure is 1 Pascal?
1 Pascal = 1 Newton per square meter
What is a unit of pressure called?
A Pascal.
Who invented the grandfather clock(pendulums)?
Galileo Galilei
How do you spin a ball in tennis?
You move the racket to the side as you hit the ball.
Who discovered that planets go around the sun?
Galileo Galillei.
Give me (and only me) 3 examples of how friction affects daily life.
It causes machines to heat up, helps make fires, helps you run without slipping
Name 3 safety features in a car.
Seat belts, Airbags, and a collapsible steering wheel.
Why can't you make a perpetual motion machine?
Because according to the 2nd Law of Thermodynamics, energy is lost from a machine as heat, noise, and friction.
What is the machine used to seperate red blood cells from the rest of the blood?
A centrifuge.
Describe how you could lift a weight 10x your weight.
Build a lever that is 11x longer on your side. Then use it.
What is Newton's First law?
1st: A object left alone won't move until something makes it move. A object that is moving Won't stop moving until something makes it stop moving.
What is Newton's Second law?
2nd: A force changes an objects speed. The change in speed is directly poportional to the strength of the force.
What is Newton's third law?
3rd: When an object exerts force on another object, the 2nd object will push back just as hard.
How high was the world's tallest house of cards?
5.85 meters.
Why does centrifugal force not exist?
Your inertia carries you forward and when you turn, your inertia tries to keep you going in the same direction.
How many Pascals of pressure are on our body and why can't we feel it?
10000 Pascals and the air in our body is pressurized.
How does a lever work?
A lever is a rigid bar on top of a fulcrum. You can use torque to lift a heavy load.
Why does a pendulum swing faster at the equator and slower at the poles?
The gravity at the equator is weaker because the Earth bulges at equator as it spins.
An egg (dome shape) can withstand 22.7 kg. Explain why columns, triangles, domes, and arches are good for holding heavy weights.
They all spread the weight over the whole shape.
Put these objects in order from fastest to slowest: a) A bullet from a high-powered gun, b) Mercury, c) Apollo 10 spacecraft(1st to land on the moon in 1969).
Correct answer: bca(107,030 mph, 24,791 mph, 2,052 mph)