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A 40-kg boy runs up a staircase to a floor 5 m higher in 7 s His power output is?
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A 40 Kg boy runs the staircase to a floor 5 meter higher in 7 seconds What is his power output?
Power (W) is work (J) done over time (s). Work (J, Joule) is force (N, Newton) moved through a distance (m). Weight (N) is the force (N) due to gravity which is not the same as someone's mass (kg). mass = 50 kg distance = 5 m time = 7 s Force due to gravity = m x g = 50 x 10 (g = 9.8 m/s2 but 10 is close and easier) = 500 Newtons P = F x d / t = 500 x 5 /7 = 357 Watts
If you do work on an object in half the time, your power output is?
If you do work on an object in half the your power output is
A weightlifter raises a 90-kg barbell from the floor to a height of 2.2 m in 0.6 s What was his average power output during the lift?
42
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Is higher DC output voltage best or low DC output voltage for half wave rectificatin?
A: BEST HOW? the input power does not change for full wave or half wave rectification The output of a half wave will have half of the power available for the output to use so it would be best a low DC requirement yes.
Why does a petrol engine have more power than a diesel engine?
A petrol engine revs higher, which allows it to burn more fuel and output more power.
A 40 Kg boy runs the staircase to a floor 5 meter higher in 7 seconds What is his power output?
Power (W) is work (J) done over time (s). Work (J, Joule) is force (N, Newton) moved through a distance (m). Weight (N) is the force (N) due to gravity which is not the same as someone's mass (kg). mass = 50 kg distance = 5 m time = 7 s Force due to gravity = m x g = 50 x 10 (g = 9.8 m/s2 but 10 is close and easier) = 500 Newtons P = F x d / t = 500 x 5 /7 = 357 Watts
