Quick questions on Forces and Newton's laws: friction and connected particles - WJEC A-Level Maths

6short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What are newton's three laws?

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The second law is the workhorse: resolve forces into a chosen direction, find the resultant, and set it equal to

ma

What is friction?

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A body on the point of moving, or already moving, has friction at its maximum value

\mu R

What are connected particles?

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For two particles joined by a light inextensible string over a smooth pulley, the string has the same tension throughout and the particles share the same acceleration magnitude.

What is q1?

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2\,\text{kg}

object has a resultant force of

10\,\text{N}

acting on it. Find its acceleration. [2 marks]

What is q2?

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Find the weight of a

6\,\text{kg}

mass (take

g = 9.8\,\text{m s}^{-2}

). [1 mark]

What is q3?

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A block on a rough horizontal surface has normal reaction

40\,\text{N}

and

\mu = 0.25

. Find the maximum friction. [2 marks]

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