Revision – Work, Energy, Power & Collisions
Physics · Grade 11 · Week 44 · 25 questions
In Grade 11 physics, Revision introduces you to Work, Energy, and Power & Collisions. Mastering these ideas sharpens your problem-solving for numericals and conceptual questions alike.
What you'll practise
- Analyse Work
- Calculate Energy
- Calculate Power & Collisions
- Apply revision concepts to NCERT exercise and exemplar problems
All 25 questions in this Revision – Work, Energy, Power & Collisions quiz
Grade 11 Physics — Revision – Work, Energy, Power & Collisions: 25 practice questions with instant scoring and explanations.
- Work done by constant force F over displacement d (angle θ):
- SI unit of work:
- Kinetic energy = :
- Work-energy theorem: W_net = :
- Gravitational PE near Earth's surface:
- Mechanical energy is conserved when:
- Power = :
- SI unit of power:
- 1 horsepower ≈ :
- 1 kWh = :
- Power can be written as P = F·v when:
- Elastic PE stored in a spring: U = :
- An elastic collision conserves:
- In a perfectly inelastic collision:
- For 1D elastic collision between equal masses with one at rest:
- Coefficient of restitution e for elastic collision:
- For perfectly inelastic collision, e = :
- A conservative force satisfies:
- Friction is a:
- The area under F-x graph gives:
- Power developed by a horse pulling 200 N at 5 m/s steady:
- A body of mass 2 kg falls 5 m. KE just before impact (g=10):
- When a ball bounces back with lower speed, the collision is:
- In explosion, fragments fly apart. Momentum is conserved if:
- Internal forces between parts of a system can change:
Question 1 of 250 correct so far