This blog will cover and explain the specification for Edexcell triple science IGCSE 2013 Physics. Hope it helps :)
how come it says unbalanced force. couldnt it not just say: 'know and use the relationship between force, mass and accel'.kind of confused :@
the way it's written is confusing but ultimately they mean the same thing
because if the forces were balanced, you would not get any acceleration
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if all the forces were balanced the object the forces are acting upon would either be stationary or moving at a constant speed. For acceleration to occur the propulsion must be greater than the air resistance for example. If one force is greater and they don't cancel each other out then the forces are unbalanced.Therefore, in a nutshell, for acceleration to occur there must be unbalanced forces.In responce to 'emmamay' they don't mean the same thing because of the reasons above