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erma4kov [3.2K]
3 years ago
13

What is the difference between input force and input work?

Physics
1 answer:
defon3 years ago
4 0
Input work=output work only when there is no friction. in the real-world input work is greater than output work the difference is the energy dissipated away due to friction. nevertheless the input force is less than the output force and the advantage of using the machine is still there
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a plane flies from Addis Ababa to Gamble is 400km. in 2 hrs, then straight back to Gamma is 200km. in 1hrs what is the average s
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Answer:

a) Average speed = 200 Km/hr

b) Average velocity = 0 m/s

c) Total distance = 800 Km

d) Total displacement = 0 Km

Explanation:

a) Let the speed of the plane from Addis Ababa to Gamble be represented by S_{1}, and from Gamble to Addis Ababa by S_{2}.

Average speed = \frac{S_{1} + S_{2} }{2}

S_{1} = \frac{distance}{time} = \frac{400}{2}

        = 200 Km/hr

S_{2} = \frac{distance}{time} = \frac{200}{1}

       = 200 Km/hr

Average speed = \frac{200 + 200}{2}

        = 200 Km/hr

b) Velocity = \frac{displacement}{time}

Average velocity = \frac{total displacement}{total time taken}

Since the plane flies from Addis Ababa to Gamble, then back to Addis Ababa, its total displacement is zero.

So that,

Average velocity = 0 m/s

c) Total distance = 400 Km + 400 Km

                           = 800 Km

d) Total displacement = 400 Km + (-400 Km)

                           = 0 Km

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