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How to we work out the speed of an object at a certain point in its trajectory?

This depends on the path of the object and what information you have. You could be looking at conservation of kinetic and gravitational potential energy. Total energy must be the same at all times. We can ma...
CC
Answered by Camilla C. • Physics tutor
2722 Views

How do I structure an A- Level essay?

First - and this sounds really obvious but you'd be surprised how many people forget - read the question carefully. Does it look like a simple 'yes' or 'no' question (at A-Level, this is rarely the case)? Is...
AF
Answered by Anna F. • History tutor
4393 Views

Who is a Soletrader?

A Soletrader is a person that sets a business in its own name, Soletrader have limited liabitily as there is no distinction between the business and themself. Limited liability means that if the business can...
MT
3179 Views

If f(x) = x^2 - 3x + 2, find f'(x) and f''(x)

f'(x) is the first derivative of f(x) therefore f'(x) = 2x - 3 To find f''(x) simply take the derivative of f'(x), therefore f''(x) = 2
PO
Answered by Peter O. • Maths tutor
5180 Views

A boy (25kg) and a girl (20kg) are playing on a see-saw which is 4m long. If the boy sits 1m from the centre on the left side and the girl 2m from the centre on the other, which direction will the see-saw will rotate around its centre?

Student should calculate the moments about the pivot point (from diagram recognise this is the centre of the see-saw) for each child. Using the equation, moment = mass x acceleration x distance from pivot, w...
JL
Answered by John L. • Physics tutor
2856 Views