Advertisements
Advertisements
Question
What is the power of a body which is doing work at the rate of one joule per second?
Advertisements
Solution
1 watt is the power of a body working at the rate of 1 Joule per second.
APPEARS IN
RELATED QUESTIONS
Define 1 watt of power.
A lamp consumes 1000 J of electrical energy in 10 s. What is its power?
A person holds a bundle of hay over his head for 30 minutes and gets tired. Has he done some work or not? Justify your answer.
Find the energy in joules consumed in 10 hours by four devices of power 500 W each.
A load of 100 kg is pulled up by 5 m. Calculate the work done. (g = 9.8 m/s2)
Define kilowatt-hour.
Fill in the blanks with suitable words :
One watt is a rate of working of one ___________ per ___________.
In an experiment to measure his power, a student records the time taken by him in running up a flight of steps on a staircase. Use the following data to calculate the power of the student :
Number of steps = 28
Height of each step = 20 cm
Time taken = 5.4 s
Mass of student = 55 kg
Acceleration = 9.8 m s−2
due to gravity
In loading a truck, a man lifts boxes of 100 N each through a height of 1.5 m.
How much energy is transferred when one box is lifted?
In loading a truck, a man lifts boxes of 100 N each through a height of 1.5 m.
If the man lifts 4 boxes per minute, at what power is he working?
(g = 10 m s−2)
