Question  Answer  % Correct 

What are the two most used states of propellant?  Liquid  83%

Solid  83%
 
What is the name for the velocity required to escape a planet's gravitational field?  Escape Velocity  67%

Who theorised that if an object was thrown fast enough it would go into a permanent orbit?  Isaac Newton  67%

Along with the fuel, what must a rocket store for the engines to work?  Oxygen supply  67%

What force provides the gradual upward lift needed for a rocket to launch?  Thrust  67%

In the absence of air resistance and other external factors, what is the trajectory of an object's shape?  A parabola  50%

Who discovered that gravity actually makes all objects fall at the same rate?  Galileo Galilei  50%

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  50%

Since gravity also decreases as the rocket rises, what is the overall effect over time on the rocket's acceleration during its full launch?  It increases  33%

If friction and other external forces didn't exist, when would an onject cease its horizontal motion?  Never  33%

Which of Newton's Law's of Motion explain why a force of propelled gases downward force the rocket upwards?  The third law  33%

When in freefall, what is the value of g forces experienced?  Zero  33%

g forces are calculated using a division equation, normal true weight is the denominator. What is the numerator?  Apparent weight  17%

What calculation is used to calculate acceleration in terms of final velocity, initial velocity and time?  a=(vu)/t  17%

a=9.8m/s^2 ____ (because it is a vector).  down  17%

Projectile motion, according to Galileo, has two separate and independant motions that superimpose each other, what are these two motions? (They are perpendicular)  Horizontal motion  17%

How do you calulate apparent weight?  mg+ma  17%

Using simple maths, if an object is rising, its g force value will always be greater than what?  One  17%

The last is in terms of r...  r=ut+1/2at^2  17%

The equation: Escape velocity = 2Gm(planet)/r(planet) is wrong. What is the right hand side missing?  Square root  17%

Therefore, when using the above equations for horizontal trajectory only, what single term does u (initial velocity) equal?  v  17%

The second is in terms of v^2 (final velocity squared)... and r=displacement  v^2=u^2+2ar  17%

Vertical motion  17%
 
What other three equations with 'a' can you use to find values for projectile motion? The first is in terms of final velocity (v)...  v=u+at  17%

The force of thrust must be greater than what other force before a rocket can lift off.  Weight  17%

What direction would the object travel if the value of g forces was below this number?  Downwards  0%

When dividing this equation by true weight, ma, the mass values cancel out leaving what equation?  (g+a)/g  0%

What kind of increase does the velocity have?  Logarithmic  0%

What types of rockets avoid excessive peaks in g forces?  Multistage rockets  0%

The direction of what can be exploited to gain a boost in velocity when trying to reach orbit?  The Earth's rotation  0%

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