StudyWithSmile — free flashcards, quizzes and exam practice for school students

Work, Energy and Simple Machines

Science · CBSE Class 9 · English Medium · 32 questions and answers

Sample questions

Q: When is work said to be done in science?

A: Work is done when a force acting on an object produces displacement in the direction of the force or has a component along the displacement.

Q: What is the formula for work when force and displacement are in the same direction?

A: W = F × s.

Q: What is the SI unit of work?

A: Joule (J).

Q: What is one joule?

A: One joule is the work done when a force of 1 N moves an object through 1 m in the direction of the force.

Q: What is energy?

A: Energy is the capacity to do work.

Sign in free to study all 32 questions with flashcards, quizzes and spaced revision.