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vodomira [7]
3 years ago
6

How much power is needed to lift a book to a height of 2.0 meters in a time of 1.0 second, if the book exerts a force of 20 Newt

ons?
Physics
1 answer:
saul85 [17]3 years ago
4 0

Answer: P = 40 W

Explanation: Power is defined as the amount of work per unit time or expressed in the formula of P = W /t

Work is the product of force and distance so W = Fd.

So the working equation will be:

P = Fd / t

= 20 N ( 2.0 m) / 1 s

= 40 W

Is the amount of power exerted.

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A spring, having an unstretched length of 2ft, has one end attached to the 10lb ball. determine the angle ? of the spring if the
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4 years ago
3.) Brady walks 5 meters forward, turns right, walks 25 meters, turns right again, walks 5
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Answer:

Distance covered is: 45 meters

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Explanation:

Notice that Brady has walk a path that looks like an incomplete rectangle of height 5 meters and length 25meters, although he actually didn't cover the full length (25 meters) when getting back to the point where he started (he made just 10 meters instead of 25 after the third turn right) See attached image.

Therefore, Brady's displacement is 15 meters to the right of where he started, and the total distance he covered is :

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3 years ago
_____ motion occurs when tectonic plates move apart from each other. A. Divergent B. Transform C. Convergent
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4 years ago
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The table shows the specific heat capacities of various substances. How much energy is required to raise the temperature of 5g o
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Answer:

Q = 50.25 [J]

Explanation:

To solve this problem we must use the following equation that relates the temperature change with the mass and with the specific heat.

Q = m*Cp*(DT)

where:

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Now replacing:

Q = 0.005*1005*10

Q = 50.25 [J]

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3 years ago
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