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Time for first bullet to hit ground: s = -1.5m, u = 0ms^-1, v = ?, a = -9.81ms^-2, t = ?.s = ut + 1/2(at²)-1.5 = 0 + 1/2(-9.81t²)9.81t²= 1.52 ...

There are two parts to this question that we should consider seperately:
Firstly, we need to work out the total thrust force that is being applied through the seat onto the astronaut. Critically, thi...

The negative value stems from the definition of gravitiational potential energy which states that it is equal to the work done by the gravitational field moving a body to its given position from infinity....

It's important to look at the number of marks awarded for an answer, this can help you structure your answer and think about what will be on the marking scheme. Here a simple statement of an application o...

Alpha radiation reduces the mass number of an atom by 4. When an atom's nucleus is unstably large, it emits an alpha particle which consists of two neutrons and two protons. This is called alpha decay. Si...