A factory manager is comparing two machines that perform the same task. Machine A takes more time to complete the task than Machine B. Based on the definition of power, which factor should the manager consider to determine which machine is more powerful?
The rate at which each machine does work
Power is defined as the rate of doing work, P = W / t.
If two machines do the same amount of work but Machine A takes more time, Machine A has less power, i.e. it does work at a slower rate than Machine B.
The comparison is therefore about how fast each machine does work.
Hence, the answer is The rate at which each machine does work.
Similar Questions
A device uses 1 kilowatt (kW) of power for 1 hour. How much energy does it consume?
Student A takes 20 seconds, while student B takes 40 seconds to complete the same amount of work. Which of the following statements is correct in connection to A and B?
If a girl of weight 40 N climbs a rope with a power of 160 W for 20 seconds, up to what height can she reach?
Rate of doing work is called ________.
What is the SI unit of Power?
Important Questions from Power
Express the power dissipated in a 100 Ω resistor in dB relative to 1 mW, when the voltage across the resistor is 1.0 Vrms
An elevator weighing 500 kg is to be lifted up at a constant velocity of 0.25 m/s. What would be the minimum horsepower of the motor to be used? G = 9.8 m/s2 and there is no frictional loss.
A man of mass 80 kg climbs up 4 m high stairs in 10 sec. Find the power spent by the man. (Take g = 10 m/sec2)
How many units of electric power will be consumed by 4 motors of 0.5 HP each in 8 hours?
The power of a water pump is 2 kW. The amount of water (in litres) it can raise in one minute to a height of 10 m will be :
(g = 10 m/s 2 )
