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Unit 4-Physics On The Move
Topic 1-Further Mechanics
Use the expression p=mv
Momentum = mass x velocity: i.e. p=mv, units kg m s¹
Momentum is a vector quantity, with both magnitude and direction.

Investigate and apply the principle of conservation of linear
momentum to problems in one dimension

Conservation of…

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Resultant force (N) is proportional to the rate of change of linear momentum (kg m s²), which is the
same as saying the resultant force is proportional to the final linear momentum minus the initial linear
momentum all divided by the time for which the force acts. Therefore, strictly speaking,…

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Collisions in two dimensions
Many collisions and interactions occur in more than one dimension. Linear momentum is a vector
quantity, and so the vector sum of all momenta after a collision or interaction must equal the original
momentum vector. To solve problems in more than one dimension, it is best…

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Angular displacement ()-The angle (in radians) turned through some time. = arcradius
. 2
radians = 360°
Angular velocity ()-The rate of change of angular displacement (rad s¹). = t =

Explain the concept of angular velocity, and recognise and use the
relationships v=r and T= 2…

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Use the expression for centripetal force F=ma= r and hence
derive and use the expressions for centripetal acceleration, a= v²
and a=r²




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