🔬
Class 9 Science — Chapter 10: Work and Energy
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Free NCERT-aligned multiple-choice practice for Class 9 Science, Chapter 10 (Work and Energy). Practise timed Easy, Medium and Hard quizzes with instant explanations — built for CBSE Board exams, JEE Main and NEET UG. Here are a few sample questions; sign in free to practise all 90.
Sample questions
Q1Easy
SI unit of work is:
A.Newton
B.Joule✓ correct
C.Watt
D.Pascal
Why
1 joule = 1 newton × 1 metre.
Q2Medium
A 10 N force moves an object 5 m in the direction of force. Work done =
A.2 J
B.15 J
C.50 J✓ correct
D.500 J
Why
W = F × d = 10 × 5 = 50 J.
Q3Hard
Work done is zero when:
A.Force is large
B.Force is perpendicular to displacement✓ correct
C.Displacement is large
D.Force opposes motion
Why
W = Fd cos θ. When θ = 90°, cos 90° = 0 ⇒ W = 0.
Practise all 90 questions free
Timed quizzes, instant scoring, streaks and XP. Sign in with Google — no card needed.
Start this chapter free →