4430593
Descrição
Quiz por Josh Anderson, atualizado more than 1 year ago
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Criado por Josh Anderson
aproximadamente 8 anos atrás
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Questão 1
Questão
If an object is spinning around a point at a constant [blank_start]speed[blank_end], the object is [blank_start]accelerating[blank_end]. This is because the object is changing [blank_start]direction[blank_end]. This means that the [blank_start]velocity[blank_end] is changing, and as [blank_start]acceleration[blank_end] is the rate of change of velocity, the acceleration changes too.
Responda
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speed
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accelerating
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direction
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velocity
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acceleration
Questão 2
Questão
From the previous question, the object is accelerating away from the centre that it is spinning around.
Responda
- True
- False
Questão 3
Questão
The name of the resultant force that causes the object to accelerate is called [blank_start]centripetal force[blank_end].
Responda
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centripetal force
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centrifugal force
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centrifloral force
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gravity
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air resistance
Questão 4
Questão
How does the resultant force on the object change when it slows down?
Responda
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It is increased/it increases.
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It is reduced/it decreases.
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It stays the same.
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The resultant force is not affected by the changing speed.
Questão 5
Questão
What is meant by the centre of mass?
Responda
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A fast-food restaurant.
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The point at which the mass can be considered to be concentrated.
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The heaviest part of an object which has the biggest weight.
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An object with the highest mass.
Questão 6
Questão
To increase the stability of an object, you can [blank_start]lower the centre of mass[blank_end].
Responda
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lower the centre of mass
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increase the mass of an object
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raise the centre of mass
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decrease the mass of an object
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make it weightless
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break it
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