All categories

3 years ago

A crane motor exerts 3,500 W to lift a load up 5 floors in 25 seconds. How much work did the crane do?

Physics

1 answer:

jok3333 [9.3K]3 years ago

4 0

Answer: 87500J

Explanation:

Given that,

Power exerted by crane = 3,500 W

Time taken = 25 seconds

work done by crane = ?

Since power is the rate of work done per unit time, then power is workdone by the crane divided by the time taken.

i.e power = work / time

3,500 W = work / 25 seconds

Work = 3500W x 25 seconds

Work = 87500J

Thus, 87500 joules of work was done by the crane.

You might be interested in

The safest way to view an image of the sun is to use.

Nostrana [21]

Answer:

Pinhole Projection

Explanation:

You will get a great view if you project a sunlight coming thrugh a small hole onto a viewing card enclosed in a long box. The smaller the pinhole, the sharper the image

7 0

2 years ago

As an IT technician for your company, you have been notified that the Windows domain does not seem to be functioning properly. B

Tasya [4]

Answer: Create a hypothesis

Explanation:

From the information given, information has been gathered and the identification to ascertain if there's a change. Then, an hypothesis has to be created in order to know what the problem is.

One has to carry out some research in order to know what went wrong and should also validate the hypothesis by consulting with ones peers. By doing this, the most likely causes of the issues will be gotten.

3 0

2 years ago

As Earth moves around the Sun, its _____ is approximately perpendicular to the force of gravity exerted by the Sun.

Bogdan [553]

SORRY i forgot but i think its A because the sun has a really strong gravitational pull

sorry and hope it helps

4 0

3 years ago

Read 2 more answers

The average distance an electron travels between collisions is 2.0 μmμm . What acceleration must an electron have to gain 2.0×10

Ilya [14]

The solution is in the attachment

4 0

3 years ago

Read 2 more answers

Find the difference between two masses measured as 123.6 grams and 115.972 grams. Express the answer to the correct number of si

xxTIMURxx [149]

Answer:

The difference is 7.6 grams.

Explanation:

In mathematics the difference of two numbers is express as the subtraction between them:

$a-b$

So to find out the difference between the two measured masses, a will be represented by 123.6 grams since is the bigger number, and b by 115.972 grams.

Therefore, it is get:

$123.6grams-115.972grams = 7.6grams$

<u>Hence, the difference is 7.6 grams. </u>

The result of 7.628 will be expressed as 7.6 to have the correct number of significant figures.

Notice how that can be express in units of kilograms too since there is 1000 gram in 1 kilogram:

$7.6grams . \frac{1Kg}{1000grams}$ ⇒ $7.6x10^{-3}Kg$

8 0

3 years ago