OnlineCBT
Physics · WORK, ENERGY AND POWER
हिन्दीMatch List-I with List-II: List-I (Physical Situation) List-II (Work Done by the Specified Force) A Moon orbiting Earth in a circular orbit I Zero work because force and displacement are mutually perpendicular B Weightlifter holding a 150 kg barbell steadily overhead II Negative work opposing displacement C Kinetic friction acting on a skidding bicycle III Zero work because displacement is zero D Raindrop falling freely under downward gravity IV Positive work in direction of displacement Choose the correct answer from the options given below:
Match List-I with List-II:
| List-I (Physical Situation) | List-II (Work Done by the Specified Force) | ||
|---|---|---|---|
| A | Moon orbiting Earth in a circular orbit | I | Zero work because force and displacement are mutually perpendicular |
| B | Weightlifter holding a 150 kg barbell steadily overhead | II | Negative work opposing displacement |
| C | Kinetic friction acting on a skidding bicycle | III | Zero work because displacement is zero |
| D | Raindrop falling freely under downward gravity | IV | Positive work in direction of displacement |
Choose the correct answer from the options given below:
Correct answer · Option 3
A-(I), B-(III), C-(II), D-(IV)
Explanation
Centripetal force is perpendicular to velocity/displacement (W=0). Holding steadily means d=0 (W=0). Kinetic friction opposes motion (W<0). Gravity acts downward along displacement (W>0).
