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To find the power output of the boy, we can use the formula: Power = Work / Time. The work done by the boy in raising his body weight to a height of 5m is 40 kg * 9.81 m/s^2 * 5 m. This equals 1962 Joules. Thus, the power output is 1962 Joules / 7 seconds, which is approximately 280 Watts.
What else can I help you with?
What is the power output of a 40 kg boy runs up a staircase to a floor 5 m higher in 7 s?
Power is the rate at which work is done, given by the formula Power = Work / Time. To calculate the power output, we first need to calculate the work done by the boy, which is equal to the product of his weight, the height of the staircase, and the acceleration due to gravity. After calculating the work done, we can then divide it by the time taken to run up the stairs to find the power output.
How does the power input affect the temperature output in a thermal system?
The power input in a thermal system directly affects the temperature output. Higher power input typically results in higher temperature output, while lower power input leads to lower temperature output. This relationship is governed by the laws of thermodynamics.
How do you calculate electrical efficiency?
Electrical efficiency is calculated by dividing the useful output power (in watts) by the input power (in watts) and multiplying by 100 to get a percentage. The formula is: Efficiency = (Useful output power / Input power) * 100. The higher the percentage of efficiency, the more effective the electrical system is at converting input power into useful output power.
How does force affect power output?
Force affects the speed of power output. If the driving force is slow, the speed of power output will also be sluggish. Alternatively, if the driving force is fast, power output will be able to match the speed.
What factor increases as the efficiency of a machine increases?
The output power of the machine increases as its efficiency improves. This means that more of the input energy is being converted into useful work, leading to higher output power.
What is the power output of a 40 kg boy runs up a staircase to a floor 5 m higher in 7 s?
Power is the rate at which work is done, given by the formula Power = Work / Time. To calculate the power output, we first need to calculate the work done by the boy, which is equal to the product of his weight, the height of the staircase, and the acceleration due to gravity. After calculating the work done, we can then divide it by the time taken to run up the stairs to find the power output.
How does the power input affect the temperature output in a thermal system?
The power input in a thermal system directly affects the temperature output. Higher power input typically results in higher temperature output, while lower power input leads to lower temperature output. This relationship is governed by the laws of thermodynamics.
Power supply units are rated in?
Power supply units are rated based on their output and efficiency. When more equipment is connected, a higher output power supply is needed.
Why is output dc higher than input ac?
Output power can never be more than input power. With a transformer, it is possible to increase the output current (while decreasing the output voltage), or to decrease the output current (while increasing the output voltage).
How do you calculate electrical efficiency?
Electrical efficiency is calculated by dividing the useful output power (in watts) by the input power (in watts) and multiplying by 100 to get a percentage. The formula is: Efficiency = (Useful output power / Input power) * 100. The higher the percentage of efficiency, the more effective the electrical system is at converting input power into useful output power.
Why does the electric sander have a higher power output than sanding by hand?
becouse its have more input
How does force affect power output?
Force affects the speed of power output. If the driving force is slow, the speed of power output will also be sluggish. Alternatively, if the driving force is fast, power output will be able to match the speed.
Why amplitude modulation is called as collector modulation?
amplitude modulation using collector modulator gives:More symmetrical envelope• Higher power efficiency• Higher output power• Need higher amplitude modulatingsignal
What car cd player has the most watts?
Power output for a car stereo is pretty standard across the board -- for higher power output you'll need to investigate amplifiers. anonymous@oola.com
Can you wire a 2 speed motor on an invertor?
Yes,provided that the power output of the investor is higher than the motor's rated power.
What factor increases as the efficiency of a machine increases?
The output power of the machine increases as its efficiency improves. This means that more of the input energy is being converted into useful work, leading to higher output power.
How many watts in 2000 PMPO?
PMPO (Peak Music Power Output) is a marketing term used by audio equipment manufacturers to inflate power ratings. It does not represent a standard measure of power output and is often much higher than the RMS (Root Mean Square) power output. Without knowing the actual RMS power output of the device, it is not possible to convert PMPO to watts accurately.
