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If a 60kg girl jumps out of a helicoptor, draw diagrams to show the forces (with values) acting on her when a) she is in freefall, b) she is accelerating at half of g (g = 10 m/s^2), c) she is travelling at a constant speed?

a) 600N arrow down for weight, no air resistance arrow, acceleration = 10m/s^2

b) 600N arrow down, 300N arrow up for air resistance, acceleration = 5m/s^2 (Using F = ma)

c) 600N arrows up...

Answered by Ella J. • Physics tutor

2027 Views

Differentiate and factorise y = x^2(3x + 1)

Product rule: dy/dx = uv' + u'v dy/dx = 2x(3x + 1) + x^2(3) dy/dx = 2x(3x + 1) +3x^2 dy/dx = 6x^2 + 2x + 3x^2 dy/dx = 9x^2 + 2x dy/dx = x(9x + 2)

Answered by Ella J. • Maths tutor

3325 Views

What makes a good essay introduction?

A strong introduction is vital for any good essay, as it lends structure to both the reader but also yourself. In order to write a convincing essay you need to outline your points clearly and briefly in t...

Answered by Clea S. • English Literature tutor

3786 Views

Critically evaluate the outcomes of globalisation

One outcome of globalisation is the advantages towards the environment. Advantages on the environment include; the efficient allocation of resources in order to prevent the wastage of valuable resources, ...

Answered by Rachel F. • Geography tutor

6156 Views

What is Cracking and why is it carried out?

Cracking is the process of breaking large Hydrocarbon molecules into smaller ones.
This is carried out to refine fuels and increase the yeild in petrolium refining.

Answered by Anna G. • Chemistry tutor

11409 Views