Answer:
a) F = μk mg Cosθ
b) F = 279.78 N
Explanation:
a) F = μk R
Based on the description in the question, the horizontal reaction is:
R = mg Cosθ
The force required to move the box with constant speed in terms of m, μk, θ, and g is :
F = μk mg Cosθ
b) If m = 90 kg
g = 9.8 m/s²
μk=0.35
θ = 25⁰
Force required to slide the 90-kg patient across a floor at constant speed by pulling on him at an angle of 25∘ above the horizontal will be:
F = μk mg Cosθ
F = 0.35 * 90 * 9.8 * cos25
F = 279.78 N
Answer:
網站有中、英文版本，也有繁、簡體版，可通過每頁左上角的連結隨時網站有中、英文版本，也有繁、簡體版，可通過每頁左上角的連結隨時
Explanation:
Power = current x voltage
So the power is 7 x 110 = 770 W = 0.77kW
0.77 x 13 = 10.01 kWh
10.01 x 10 cents = 100.1 cents (is this 1 dollar? Idk I use a different currency)
See this. I hope you find your answer
Explanation:
In the plane of the Solar System, called Ecliptic plane, Sun is at the center and all the planets including Earth are going around the Sun in their respective orbits. As seen form the Earth, Sun appear to go around it and in this process it crosses through 12 constellations. These constellations are called as Zodiacs. Now since all the planets move in almost the same plane, they will appear in the sky to be lying near the ecliptic.
Sun's own motion is not that evident to us because of which the impact of that motion is nullified. But, motion of planet is clearly visible and it also shows in their annual round around the Sun. Here, Mars also shows retrograde motion which means it will show a back and forth motion in the sky. Because of which Mars might be visible in the same zodiac for a longer Duration as compared to the Sun.
