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CAIE A-Level Physics AS 5.2.3 The Equations of Motion the Formula for Kinetic Energy Ek 1 2 Mv2 Questions

Use equations of motion and EK = ½mv² to relate motion variables and kinetic energy.

Syllabus
2028–2030
Course
Physics 9702
Level
AS

Exam points

  • Use equations of motion and EK = ½mv² to relate motion variables and kinetic energy.

CAIE A-Level Physics AS 5.2.3 The Equations of Motion the Formula for Kinetic Energy Ek 1 2 Mv2 Questions question 1

[Maximum number: 1]

A student attempts to derive the formula for kinetic energy EKE_{\mathrm{K}}. She begins by considering an object of mass m which is initially at rest. A constant force F applied to the object causes it to accelerate to final velocity v in displacement s. The kinetic energy gained by the object is equal to the work done on the object by the force F.

Which equation would the student not need in order to derive the formula for EKE_{\mathrm{K}} ?

A

F=m a

B

W=F s

C

E=12FsE=\frac{1}{2} F s

D

v2=u2+2asv^{2}=u^{2}+2 a s

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