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Forces and Dynamics
Quick questions on Forces and Newton's laws: N(A)-Level Physics dynamics
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 is newton's first law?Show answer
Newton's first law says that an object stays at rest, or keeps moving at a constant velocity in a straight line, unless a resultant force acts on it.
What is newton's second law?Show answer
Newton's second law links the resultant force to the acceleration:
What is newton's third law?Show answer
Newton's third law says that if object A pushes on object B, then object B pushes back on A with an equal and opposite force. Forces always come in pairs that act on two different objects.
What are wrong units?Show answer
Force in newtons, mass in kilograms, acceleration in . Mixing grams or other units gives a wrong answer.
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