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A 1kg ball is dropped of a 20m tall bridge onto tarmac. The ball experiences 2N of drag throughout its motion. The ground has a coefficient of restitution of 0.5. What is the maximum height the ball will reach after one bounce

Energy GPE of the ball on the bridge: MGH = 1 * 9.81 * 20 =196 J energy lost to drag = F * D = 2 * 20 = 40 J Velocity of the ball just before impact =sqr(2*(196-40)/1) =17.66 m/s Velocity of the ball just af...
MD
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It is common to selectively breed domestic animals/pets, such as cats and dogs. Give three reasons people may want to selectively breed dogs.

For aesthetic reasons (shorter snout, lighter fur etc)To reduce allergensTo reduce aggression To breed out genetic defects
RF
Answered by Ruby F. • Biology tutor
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Triangle ABC has perimeter 20 cm. AB = 7 cm. BC = 4 cm. By calculation, deduce whether triangle ABC is a right-angled triangle.

This is a question I recently tackled with one of my tutees from the edexcel GCSE specimen papers. I would begin to tackle any geometry question like this by drawing the triangle in question. We are given th...
CH
Answered by Carter H. • Maths tutor
6263 Views

In ecology, what does the phrase 'carrying capacity' refer to and what factors may determine it?

Carry capacity refers to the maximum population size a species can reach in a particular environment.Important factors in determining carry capacity (among others):Food availabilityPredator population sizeSp...
JG
Answered by Jacob G. • Biology tutor
3695 Views

How should I structure the coursework essay I have been set?

The easiest way to structure your coursework essay is through a rigid plan that you religiously stick to. Before you go to write the essay create an essay plan that runs through your argument by thematically...
DD
Answered by Daniel D. • History tutor
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