Momentum / forces

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Flashcards on a-level momentum / forces
Cian Chappell
Flashcards by Cian Chappell, updated more than 1 year ago
Cian Chappell
Created by Cian Chappell over 6 years ago
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Question Answer
What is the difference between a scaler and a vector. Scaler only have a magnitude but vectors have both magnitude and a direction.
What is meant by Moment? A moment is the force multiplied by the perpendicular distance between the line of action of the force and the pivot.
What is the principle of moments? When an object is in equilibrium the sum of the anti-clock wise moments equals the sum of the clockwise moments.
What is the equation that links with this digram? M = F x S
What is the centre of gravity? This is the point in an object where all the weight seems to act.
How to find the acceleration of an object?
What are the equation of motion?
What does the gradient mean on a displacement time graph? Velocity
What does the gradient mean on a velocity time graph? Acceleration
Newton's first law An object continues in a state of rest or uniform motion in a straight line unless acted on by a resultant force.
Newton's second law The rate of change of momentum of an object is directly proportional to the resultant force applied and is in the direction of the resultant.
Newton's third law When two objects interact they exert equal and opposite forces on each other.
How to work out the Work-done Work-done = Force x Distance W = F.d
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