p = 15
Explanation:
p=w/t
p= 45/3
p=15 watts
Use the definition of power as energy / time. Or work / time; it's basically the same thing.
To calculate the work done by a 1 kW motor in one minute, we can use the formula: [ \text{Work} = \text{Power} \times \text{Time} ] Given that power is 1 kW (or 1000 watts) and time is 1 minute (or 60 seconds), we can substitute the values: [ \text{Work} = 1000 , \text{W} \times 60 , \text{s} = 60000 , \text{J} ] Thus, a 1 kW motor does 60,000 joules of work in one minute.
To find the time it takes for a 500 W electric motor to do (1.50 \times 10^5) J of work, we can use the formula: [ \text{Power} = \frac{\text{Work}}{\text{Time}}. ] Rearranging gives us: [ \text{Time} = \frac{\text{Work}}{\text{Power}} = \frac{1.50 \times 10^5 \text{ J}}{500 \text{ W}} = 300 \text{ seconds}. ] Thus, it would take 300 seconds, or 5 minutes, for the motor to perform that amount of work.
you divide;work/time=power (/=divided by< I think)
From seconds to minutes: 1 minute/60 seconds For 90 seconds: (90 seconds)*(1 minute/60 seconds)=1.5 minutes
The power required to do 40 J of work in 5 seconds is 8 watts. This can be calculated by dividing the work (40 J) by the time (5 seconds). The formula for power is Power = Work / Time.
Power is defined as the rate at which work is done or energy is transferred. It is typically measured in watts and is the product of force and velocity. Mathematically, power is equal to work done divided by time taken to do the work.
Power is equal to work done divided by time, where work done is force multiplied by distance. In this case, the work done is 100 newtons * 10 meters = 1000 joules. Therefore, the power used would be 1000 joules / 5 seconds = 200 watts.
To find the time taken, use the formula: time = work / power. Therefore, time = 450 J / 25 W = 18 seconds.
To calculate work done by a power source, we use the formula Work = Power x Time. First, convert quarter-horsepower to watts (1 hp = 746 watts), so a quarter-horsepower is 186.5 watts. Next, convert 10 minutes to seconds (10 minutes = 600 seconds). Finally, calculate the work: Work = 186.5 watts x 600 seconds = 111,900 joules.
To calculate the time it takes to perform 475 Joules of work with 25 watts of power, you use the formula: time = work / power. In this case, time = 475 Joules / 25 watts = 19 seconds. So, it will take 19 seconds to perform 475 Joules of work with 25 watts of power.
To calculate power, you can use the formula: Power = Work / Time. To find the work done, you can use the formula: Work = Force x Distance. First, calculate the work done by the man (Work = 100 kg x 9.81 m/s^2 x 14 m). Then, find the power by dividing the work by the time (Power = Work / Time).
The question is inconsistant. You cannot use time as a unit for length.
To calculate power, you can use the formula: Power = Work / Time. In this case, the work done is 425 J and the time taken is 10.5 seconds. Plugging these values into the formula, the power expended by the boy to pull the sled up the hill is 40.48 watts.
The situation involving more power is 50 Joules of work done in 4 seconds because power is calculated as work divided by time. In this case, the power would be 12.5 Watts (50 J / 4 s = 12.5 W), while for the first situation it would be 10 Watts (200 J / 20 s = 10 W).
To calculate the time taken to do 5000 joules of work with a 100-watt machine, you can use the formula: time (seconds) = work (joules) / power (watts). Therefore, the time taken would be 5000 joules / 100 watts, which equals 50 seconds for the machine to complete the work.
If one were to do one hundred Joules of work in five seconds, he/she would have a power output of 20 Watts.