Work, Energy and Power
Class 11 · Physics
61 questions23 easy25 medium13 hard
Sample Questions
Q1.1 kilowatt-hour (kWh) is equal to:
- A1000 J
- B3.6 x 10^5 J
- C3.6 x 10^6 J
- D3.6 x 10^3 J
Q2.The coefficient of restitution e for a perfectly elastic collision is:
- A0
- B0.5
- C1
- Dinfinity
Q3.A force F = (3i + 4j) N displaces an object by d = (2i + 3j) m. The work done is:
- A6 J
- B12 J
- C18 J
- D25 J
Q4.In a head-on perfectly inelastic collision, the loss in kinetic energy is:
- Am1 m2 (v1 - v2)^2 / (2(m1 + m2))
- B(m1 + m2)(v1 - v2)^2 / 2
- Cm1 v1^2 / 2
- Dm1 m2 v1^2 / (m1 + m2)
Q5.The kinetic energy of a satellite in a circular orbit of radius r around Earth (mass M_E) is:
- AGM_E m/(2r)
- B-GM_E m/r
- CGM_E m/r
- D-GM_E m/(2r)
Q6.This is a sample question to preview what you'll get in the full practice test...
- A. Option one
- B. Option two
- C. Option three
- D. Option four
Concepts Covered
Circular Motion DynamicsConservation of EnergyConservative and Non-Conservative ForcesElastic and Inelastic CollisionsKinetic EnergyLinear MomentumPotential EnergyPowerSpring Force and Potential EnergyWork Done by a Constant ForceWork Done by a Variable ForceWork-Energy Theorem
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