CourseCourseConceptConceptDocsDocuments

CAIE A-Level Physics AS 5.1.4 The Concept of Efficiency to Solve Problems Questions

Calculate efficiency as useful energy output divided by total energy input, expressed as a percentage.

Syllabus
2028–2030
Course
Physics 9702
Level
AS

Exam points

  • Calculate efficiency as useful energy output divided by total energy input, expressed as a percentage.

CAIE A-Level Physics AS 5.1.4 The Concept of Efficiency to Solve Problems Questions question 1

[Maximum number: 1]

A child's toy uses the spring in (a) to launch a ball of mass 0.020 kg vertically into the air. The ball is initially held against one end of the spring which has a compression of 0.045 m . The spring is then released to launch the ball. The kinetic energy of the ball as it leaves the toy is 0.72 J .

The toy converts the elastic potential energy of the spring into the kinetic energy of the ball. Use the information in (a)(ii) to calculate the percentage efficiency of this conversion.

All question bank results loaded