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Oxbridge Preparation
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A rocket is at rest on the moon, where g=2 m/s^2. It has a total mass of 1500kg, 1000kg of which is fuel. Fuel is propelled out of the bottom of the rocket at 400m/s, at a rate of 10kg/s. Derive an equation to show its upwards acceleration over time.

The first step is to construct a force diagram of the rocket, which has two forces acting on it; its weight (W) and thrust (T) in opposite directions. T can be calculated by combining the equations F=ma a...

Answered by Alexander B. Oxbridge Preparation tutor
1516 Views

Do we have a moral obligation to protect the weak globally?

If faced with this at interview, the first thing to do is BREATHE! You aren't going to come up with a well thought through answer if you panic and blurt out the first thing that comes into your head. The ...

Answered by Priya E. Oxbridge Preparation tutor
1357 Views

How does the inside of a cell compare to a galaxy?

Both the inside of a cell and a galaxy fall into a stable pattern, with a clear centre. In the natural world, there are lots of stable forms both in biology and physics - unstable things do not last for v...

Answered by Charlotte M. Oxbridge Preparation tutor
1696 Views

If the State could ensure all criminals were convicted 100% of the time, but at the cost of the total loss of privacy of all other civilians, would it be justifiable?

This was a question I was asked in my Law interview. Some knowledge of the main human rights instruments is useful but not essential. It would help the candidate here to have read Tom Bingham's 'The Rule ...

Answered by Tutor116696 D. Oxbridge Preparation tutor
1228 Views

In my interview, what if they ask me a question on a topic I know nothing about?

It’s tempting, in this situation, to panic and rush into the subject, but this usually results in a garbled splurge of word vomit, and what they want to see is that you think in a calm and logical way. So...

Answered by Octavia A. Oxbridge Preparation tutor
1221 Views

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