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Launching into Space
From the Yr 12 HSC Physics Course Space
This is quite difficult
Any suggestions are welcome
Last updated: July 20, 2018
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July 20, 2018
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Who discovered that gravity actually makes all objects fall at the same rate?
In the absence of air resistance and other external factors, what is the trajectory of an object's shape?
Projectile motion, according to Galileo, has two separate and independant motions that superimpose each other, what are these two motions? (They are perpendicular)
What calculation is used to calculate acceleration in terms of final velocity, initial velocity and time?
What other three equations with 'a' can you use to find values for projectile motion? The first is in terms of final velocity (v)...
The second is in terms of v^2 (final velocity squared)... and r=displacement
The last is in terms of r...
If friction and other external forces didn't exist, when would an onject cease its horizontal motion?
Therefore, when using the above equations for horizontal trajectory only, what single term does u (initial velocity) equal?
a=9.8m/s^2 ____ (because it is a vector).
Who theorised that if an object was thrown fast enough it would go into a permanent orbit?
What is the name for the velocity required to escape a planet's gravitational field?
The equation: Escape velocity = 2Gm(planet)/r(planet) is wrong. What is the right hand side missing?
What force provides the gradual upward lift needed for a rocket to launch?
Along with the fuel, what must a rocket store for the engines to work?
What are the two most used states of propellant?
Which of Newton's Law's of Motion explain why a force of propelled gases downward force the rocket upwards?
The third law
The force of thrust must be greater than what other force before a rocket can lift off.
Although upwards thrust is constant, the acceleration of the rocket is never 100% and never constant either. What mass is decreasing which causes this to happen?
The fuel's mass is burning away
Since gravity also decreases as the rocket rises, what is the overall effect over time on the rocket's acceleration during its full launch?
What kind of increase does the velocity have?
g forces are calculated using a division equation, normal true weight is the denominator. What is the numerator?
How do you calulate apparent weight?
When dividing this equation by true weight, ma, the mass values cancel out leaving what equation?
Using simple maths, if an object is rising, its g force value will always be greater than what?
What direction would the object travel if the value of g forces was below this number?
When in free-fall, what is the value of g forces experienced?
What types of rockets avoid excessive peaks in g forces?
The direction of what can be exploited to gain a boost in velocity when trying to reach orbit?
The Earth's rotation
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