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Irina18 [472]
3 years ago
12

A horse does 860 j of work in 420 seconds while pulling a wagon. what is the power output of the horse? round your answer to the

nearest whole number.
Physics
2 answers:
kicyunya [14]3 years ago
6 0

the correct answer is 2w

GenaCL600 [577]3 years ago
6 0

By definition, the power is given by:

P = \frac{W}{t}

Where,

W: work done

t: time spent doing work

Therefore, substituting values we have:

P = \frac{860}{420}\\P = 2.05 watts

Rounding the nearest whole we have:

P = 2 watts

Answer:

The power output of the horse is:

P = 2 watts

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The longest banana split ever made was 7.32 km long (obviously they used more than one banana). If an archer were to shoot an ar
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Answer:

The horizontal displacement of the arrow is not larger than the banana split.

Explanation:

Using y - y₀ = ut - 1/2gt², we find the time it takes the arrow to drop to the ground from the top of mount Everest.

So, y₀ = elevation of Mount Everest = 29029 ft = 29029 × 1ft = 29029 × 0.3048 m = 8848.04 m, y = final position of arrow = 0 m, u = initial vertical speed of arrow = 0 m/s, g = acceleration due to gravity = 9.8 m/s² and t = time taken for arrow to fall to the ground.

y - y₀ = ut - 1/2gt²

0 - y₀ = 0 × t - 1/2gt²

-y₀ = -1/2gt²

t² = 2y₀/g

t = √(2y₀/g)

Substituting the values of the variables, we have

t = √(2y₀/g)

= √(2 × 8848.04 m/9.8 m/s²)

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= √(1805.72 s²)

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