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How do I sketch a polynomial function?

Before you start it is best to gather as much information as you can about the function. The most important things to find are any roots - as these will tell where the graph should cross the axis - and the t...
JL
Answered by Julu L. • Maths tutor
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A car of mass 800 kg is accelerated horizontally by constant net force of 1920 N for 9 s. It then breaks for 2 s, but drives off a 5 m high cliff. If μ = 0.85, what is the total horizontal distance travelled by car and its velocity? Ignore air resistance.

F=ma, so a=F/m giving a=2.4m/s^2. When t=9s, v=at, so v=21.6m/s. Friction force is Ff = μF(normal), which is Ff = μmg, so Ff = 6670.8N (if g = 9.81m/s^2). Frictional force always acts against the direction o...
MK
Answered by Martin K. • Physics tutor
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Discuss the role of neural and/or hormonal mechanisms in aggression (8 marks+ 16 marks)

In normal levels serotonin can have a calming, inhibitory effect on neural firings in the brain. However, in low levels the inhibitory effect of serotonin is removed. This results in individuals being less a...
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Answered by Bethan P. • Psychology tutor
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Is Virgil's Aeneid a pro-Augustan epic?

Augustus was the first emperor of Rome and was heavily concerned with securing his own legitimacy and creating a long-lasting legacy for himself. One of the ways in which he did this was by writing himself i...
HS
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What are the skill sets I will be required to know in order to write a good philosophy essay?

It is extremely important in philosophy, more so than other subjects, to demonstrate your ability to think critically and analyse arguments. The examiner will be looking for your ability to think, rather tha...
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Answered by Sophie R. • Philosophy tutor
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