What is the average power output of an athlete who can life 9.0 * 10^2 kg 2.5 m in 2.0 s?
1 answer:
Answer:
Average power output of athlete = 11025 Watts
Explanation:
Work done is defined as the product of force applied and the displacement perpendicular to the force.
Work =
Power is defined as work done per unit time.
Power =
Here the person lifts 900 kg.
Height = 2.5 m
Time interval = 2 seconds
Force =
=
= 8820 N
Work done =
=
= 22050 J
Power =
= 11025 Watt
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Answer:
Slit width is 0.109 mm
Solution:
As per the question:
Wavelength of the light,
Distance from the screen, D = 5.6 m
Bright band in the center, 2x = 8.1 cm
x = 4.05 cm
Now,
To calculate the slit width, w:
From the diffraction:
For small angle:
≈
Also
Thus
Substituting appropriate values in the above eqn:
w = 0.109 mm