Edexcel A-Level Physics Kinetic Energy from Momentum

Practise Edexcel A-Level Physics kinetic energy from momentum by deriving p squared over 2m and applying it to particles.

Exam points

derive kinetic energy equals p squared over 2m from half mv squared and p equals mv
use p squared over 2m to compare particle energies or calculate momentum after work is done

[Maximum number: 1]

A non-relativistic particle of mass m has momentum p and kinetic energy E_k.
A second non-relativistic particle of mass m/2 has momentum 2p.
Which of the following expressions gives the kinetic energy of the second particle?

E_k/2

E_k

2E_k

8E_k

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4.3.86 - Kinetic energy from momentum question 1