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If Hannah slows down from a speed of 12 m/s to 8 m/s and has a mass of 45kg, how much force has been exerted on her to cause this deceleration?

Since force = mass x acceleration, acceleration = 4 as the change in velocity is 4 m/s and m = 45 as the mass of Hannah is 45 kg and hence the force required to be exerted on her is 4*45 which is 180N.
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Answered by Musa A. • Physics tutor
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Was sind die Vor- und Nachteile der Technologie für Jugendliche?

Es gibt viele Vorteile der Technologie, zum Beispiel können Jugendliche SMS schicken, im Internet surfen, und Freunden anrufen. Außerdem benutzen viele Jugendliche Computers, um Hausaufgaben zu machen oder z...
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Answered by Katharine C. • German tutor
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Quelles sont les avantages et les inconvénients de la téchnologie pour les jeunes?

Il y a beaucoup d'avantages de la téchnologie pour les jeunes. Ils peuvent envoyer des SMS, écouter de la musique et surfer sur l'internet. Les jeunes utilisent aussi des ordinateurs pour faire leurs devoirs...
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Answered by Katharine C. • French tutor
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A common question would be how to factorise into two brackets, for example x^2 + 5x = -6

The first thing you must do is get all the terms on the same side, which we do by adding 6 to both sides : x^2 + 5x + 6 = 0. Next, we must work out which numbers add to the middle term, and write these down ...
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Answered by Madeleine T. • Maths tutor
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What is diffusion and how is it different from osmosis?

Diffusion can otherwise be known as the technical term for the movement of particles. It is the process where the particles in question moves from an area where it is high in concentration to an area where i...
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Answered by Alvina K. • Biology tutor
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