Actually Welcome to the concept of Efficiency.
Here we can see that, the Input work is given as 2.2 x 10^7 J and the efficiency is given as 22%
The efficiency is => 22% => 22/100.
so we get as,
E = W(output) /W(input)
hence, W(output) = E x W(input)
so we get as,
W(output) = (22/100) x 2.2 x 10^7
=> W(output) = 0.22 x 2.2 x 10^7 => 0.484 x 10^7
hence, W(output) = 4.84 x 10^6 J
The useful work done on the mass is 4.84 x 10^6 J
Answer:
v = 36.667 m/s
Explanation:
Knowing the rotational inertia as
Lₙ = 550 kg * m²
r = 1.0 m
m = 30.0 kg
To determine the minimum speed v must have when she grabs the bottom
Lₙ = I * ω
I = ¹/₂ * m * r²
I = ¹/₂ * 30.0 kg * 1.0² m
I = 15 kg * m²
Lₙ = I * ω ⇒ ω = Lₙ / I
ω = [ 550 kg * m² /s ] / ( 15 kg * m² )
ω = 36.667 rad /s
v = ω * r
v = 36.667 m/s
Answer: Acceleration is directly proportional to force.
Explanation: According to Newton's Second Law of Motion the amount of Force is equal to the product of mass and acceleration or F = ma. If we derive this formula for acceleration it will become a = F / m.
The relationship between acceleration and force is directly proportional which means that greater force will result to greater acceleration as along mass remains constant.
<span>The speed is a scalar quantity which by definition is the distance traveled per unit of time. Unit for speed is: km/h. (how many km the object is moved for one hour) or mph (miles per hour).
From the given option D. A dog runs an average 8 mph. (this means that a dog is moving 8 miles per hour).
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Starting from rest, the plane travels a distance
<em>x</em> = 1/2 <em>at</em>²
with acceleration <em>a</em> after time <em>t</em>. In this instance, it travels
<em>x</em> = 1/2 (3.20 m/s²) (32.8 s)²
<em>x</em> ≈ 1720 m
