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Ostrovityanka [42]
3 years ago
6

A tow can pull a car out of a ditch in 7.5 seconds. How many work is done if the truck has power of 5500 watts?

Physics
1 answer:
Alinara [238K]3 years ago
8 0
Power = ( force * distance) / time
work = force * distance
work = power * time
         =  41250 J or 41kJ

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A child of mass 27 kg swings at the end of an elastic cord. At the bottom of the swing, the child's velocity is horizontal, and
snow_tiger [21]

Answer:

The magnitude of the rate of change of the child's momentum is 794.11 N.

Explanation:

Given that,

Mass of child = 27 kg

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There is a rate of change of the perpendicular component of momentum.

Centripetal force acts always towards the center.

We need to calculate the magnitude of the rate of change of the child's momentum

Using formula of momentum

\dfrac{dp}{dt}=F

\dfrac{dP}{dt}=\dfrac{mv^2}{r}

Put the value into the formula

\dfrac{dP}{dt}=\dfrac{27\times10^2}{3.40}

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7 0
3 years ago
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Bingel [31]
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3 0
3 years ago
What is the buoyant force of a dog displacing 10 pounds of water?
scZoUnD [109]

Answer:

find V using d = M/V

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3 0
2 years ago
two horses are pulling a 325 kg wagon, initially at rest. The horses exert 250 N and 178 N forward forces, respectively. Ignorin
Dovator [93]

Answer:

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Explanation:

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v_f=v_i+a\,*\,t\\v_f=0+1.32\,*\,3.5\,\,\frac{m}{s} \\v_f=4.62\,\,\frac{m}{s}

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3 years ago
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blagie [28]

Answer: A

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4 0
3 years ago
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