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Mechanics and materials
Quick questions on Forces and Newton's laws: vectors, equilibrium and moments - Edexcel A-Level Physics
4short 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?Show answer
The second law is the key calculating tool: find the resultant force, then . The third law explains rocket propulsion, walking, and why a book on a table is not the same Newton pair as the table pushing the book up (that is the normal contact pair with the book pushing down on the table).
What is q1?Show answer
State Newton's second law in its momentum form. [1 mark]
What is q2?Show answer
A force of N acts at degrees to the horizontal. Find its horizontal component. [2 marks]
What is q3?Show answer
A m spanner needs a moment of N m to loosen a bolt. Find the perpendicular force required at the end. [2 marks]
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