CBSE Class 11-science Physics Energy And Power
- 10th sum
- A machine gun fires 360 bullets per minute and each bullet trvels with a velocity of 600ms-1.If the mass of each bullet is 5gm.find the power of the machine gun
- Define power. State its units.
- What is the mass-energy equivalence relation?
- State the series of changes in energy when a pole vaulter runs towards the bar and crosses it.
- Aman and Aryan lift 50 Kg dumbbell over their head through same distance. Aman lifts it 10 times in 1 minute whereas Aryan lifts it 10 times in 10 seconds. Who does more work and who has more power?
- Explain how the energy is transformed in roller coaster?
- What is h.p.? What is the relation between h.p. and watts?
- What is kilo-watt hour?
- A lift at a construction site moves 10 labourers every minute from the first floor of the building to the second. The second floor is 6.0 metres above the first floor. If the average mass of labourers is 56 kg, determine the power requirement of the lift in order to move this number of passengers in this amount of time.
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