Home
Class 9
PHYSICS
A person performs 420 J of work in 5 min...

A person performs 420 J of work in 5 minutes. Calculate the power delivered by him.

Text Solution

Verified by Experts

Work done by the person, W = 420 J
Time taken to complete the work,
t = 5 min = 5 x 60s = 300s
Power delivered, P = W/t
=420/300 = 1.4 W
Promotional Banner

Topper's Solved these Questions

  • WORK AND ENERGY

    NCERT GUJARATI|Exercise Let us Improve our learning (Reflections on concepts)|5 Videos
  • WORK AND ENERGY

    NCERT GUJARATI|Exercise Let us Improve our learning (Application of concepts)|6 Videos
  • SOUND

    NCERT GUJARATI|Exercise Let us Improve our learning (Multiple choice questions)|5 Videos

Similar Questions

Explore conceptually related problems

A man carrying a bag of total mass 25 kg climbs up to a height of 10 m in 50 seconds. Calculate the power delivered by him on the bag. (AS_(1))

A carnot engine opeates between two reservoirs of temperature 900K and 300K. The engine performs 1200J of work per cycle. The heat energy in (J) delivered by the engine to the low temperature reservoir in a cycle is

An escalator is used to move 5 people ( 60kg each) per minute from the first floor of a department store to the second floor. 20m above. Neglecting friction calculate the power required ?

A body cools from 80 ^(@) C " to " 50 ^(@) C in 5 minutes. Calculate the time it takes to cool from 60 ^(@) C " to " 30^(@) C . The temperature of the surroundings is 20 ^(@) C .

The work done by a force F_1 is larger than the work done by another force F_2 . Is it neccesary that power delivered by F_1 is also larger than that of F_2 ? Why

A body cools from 80^(@)C to 50^(@)C in 5 minutes Calculate the time it takes to cool from 60^(@)C to 30^(@)C . The temperature of the surroundings is 20^(@)C .

A porter lifts a luggage of 15 kg from the ground and puts it on his head 1.5 m above the ground. Calculate the work done by him on the luggage.