Forces Are Interactions (HSC SSCE Physics): Quizzes

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Forces are Interactions
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What are forces best described as?

Interactions between objects

In force notation FA on BF_{\text{A on B}}, what does this represent?

Object A exerts a force on object B

Which of these is a field force?

Gravitational force

What are the two perpendicular components of any contact force between surfaces?

Normal force and friction force

Which type of friction acts when surfaces are already sliding relative to each other?

Kinetic friction

What is the gravitational force on an object with mass mm near Earth's surface?

mg⃗m\vec{g}

According to Newton's first law, when no force acts on an object, its acceleration is what?

Zero

Newton's second law states F⃗=ma⃗\vec{F} = m\vec{a}. What is 11 newton in base units?

1 kg⋅m⋅s−21 \text{ kg} \cdot \text{m} \cdot \text{s}^{-2}

Newton's third law states: if A exerts force on B, then what does B do?

Exerts equal & opposite force on A

Which is true about Newton's third law force pairs?

They act on different objects

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