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Science L6 Gravity and Inertia and Centrifugal f ...
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When I throe a baseball, what causes it to fall back to earth? Less gravity at the point of its highest position OR air resistance
Air resistance
Is gravity a force that attracts or repels?
Attracts
Why do you weigh less on the moon? Due to less gravitational pull or due to the composition of the moon?
Less gravitational pull
Why do you think that gravity on the moon is less than on earth? Is it to do with the atmosphere or with the weight of the moon?
Weight of the moon
As you are in a car sriving and you go around a corner, the car goes one way and you go the opposite way. What type of inertia is this? Inertia of motion or inertia of direction
Inertia of direction
What example can you give for Inertia of Motion? In a car that suddenly stops or turning a corner
Car suddenly stops
What would happen to an astronaut walking in space if there was no gravity affect on him?
Float away quickly
What are some of the objects that have a constant trajectory around the earth?
Moon, ISS, satellites, Hubble telescope, Tiangong space station
What is the "trajectory" of an object?
Its path
What must be balanced for a spacecraft to stay in orbit? Gravity and centrifugal force OR gravity and inertia
Gravity and inertia
When an astronaut floats in space , what is this called?
Free fall
Do objects in space feel air resistance or not?
No
What shape would elliptical be? Round or oval or hexagonal
Oval
The combined forces of inertia and gravity cause what about a planet? An elliptical orbit OR straight movement
Elliptical orbit
What 2 forces control movement of planets?
Inertia and gravity
How does inertia affect mass and mass affect inertia? The greater the mass the greater the inertia OR the smaller the mass the greater the inertia?
The greater the mass the greater the inertia
Inertia will keep an object moving in a straight line or a new direction?
Straight line
Everything with mass has inertia. True or false
True
Why do you weigh less at the equator? Because you are closer to or further from the center of mass of the earth?
Further away so less gravity pulling you down
Is earth a perfect sphere? Why or why not?
No, centrifugal force pulls it to the center
If an object is big enough what will happen? It will shrink or it will take up a shape
Take up a shape
The greater an object the less its gravity. True or false
False
What do planets have in common?
Round, orbit the sun, under influence of gravity
What force causes earth to change its shape slightly? Centrifugal force OR Newtons force
Centrifugal force
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