The SI unit of force is the
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12 questions
Convert km h⁻¹ to m s⁻¹.
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Find the weight of a particle of mass kg. (Take m s⁻².)
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Which of these is a scalar quantity?
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A force of kN acts on a crate. Write this in newtons.
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In Edexcel IAL mechanics, the acceleration due to gravity is taken as
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A ball has mass g. Write its mass in kilograms.
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A model of a lift treats the passenger as a particle. Why is this reasonable?
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A model predicts a car stops in m when braking, but the real car needs m. Which is the most likely reason?
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A ball is dropped and modelled with air resistance ignored. If air resistance were included, the time to reach the ground would be
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A car towing a trailer is modelled as two particles joined by a light inextensible rod. Which is the most realistic improvement to the model?
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A stone is thrown upwards and modelled as a particle with air resistance ignored. Compared with the model, a real stone would reach
Salam Academy Original Practice · Proposed mark scheme