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Troyanec [42]
3 years ago
9

A horse draws a sled horizontally across a snow-covered field. The coefficient of friction between the sled and the snow is 0.13

5, and the mass of the sled, including the load, is 195.9kg. If the horse moves the sled at a constant speed of 1.785m/s, what is the power needed to accomplish this?
Physics
1 answer:
Aleksandr-060686 [28]3 years ago
3 0

Answer:

P = 462.62 watts

Explanation:

The power needed to accomplish this can be calculated how

P = Fv

    Where F:  The force exerted by the horse

                v:  velocity

The force exerted by the horse is against friction force; how the movement is with constant velocity these forces must be equals, then

Fr = μN

    =μmg

    = (0.135)(195.9)(9.8)

    = 259.17 N

And the power is

P = (259.17)(1.785)

P = 462.62 watts

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Answer:

The number of atoms are 1.86\times10^{8}.

Explanation:

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Diameter D = 1.40\times10^{2}\ pm

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Using formula of numbers of atoms

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3 years ago
A stone is thrown horizontally with an initial speed of 10 m/s from the edge of a cliff. A stopwatch measures the stone's trajec
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Answer:

The height of the cliff is 90.60 meters.

Explanation:

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Initial vertical speed of the stone, u' = 0 (as there is no motion in vertical direction)

The time taken by the stone from the top of the cliff to the bottom to be 4.3 s, t = 4.3 s

Let h is the height of the cliff. Using the second equation of motion in vertical direction to find it. It is given by :

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