GENERAL PHYSICS 1

Please provide the best answers to each question. (10 qs)

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1. A taho vendor carries a 1.5 m long light plank over his shoulder. At the ends of the planks are buckets weighing 40 N (bucket A) and 60 N (bucket B), respectively. Neglect the weight of the plank. Where should he support the plank for it to be balanced?

2. A boy with a mass of 60 kg climbs a tree 3 meters high. How much gravitational potential energy does he gain as a result of the climb?

3. The centre of mass of a body is often called centre of ______.

4. If the radius of earth were to shrink by one percent (its mass remains the same), then the acceleration due to gravity on the earth's surface would ____.

5. What is the velocity of a wave whose wavelength is 2 m and whose frequency is 5 Hz?

6. The list below are example of simple harmonic motion except: (odd one out)

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7. The frequency of a sound wave traveling through water at 1482ms is record to be 40Hz, what is the period of the wave?

8. Which type of harmonic motion refers to oscillatory motion with decreasing amplitude?

9. In which type of wave are the particles of the medium vibrate parallel to the direction of wave propagation?

10. It is also known as sine wave.

11. What are sounds below 20 Hz called?