3 years ago

Why weigh is not constant planet to planet?

Physics

1 answer:

ahrayia [7]3 years ago

3 0

Gravitational pull changes between each planet while its the "MASS" which doesnt change

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A pulley is used to raise a heavy crate. With the pulley it only takes an effort force of 223 N to

RoseWind [281]

Answer:

1784/223 = 8:1

Explanation:

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3 years ago

A student lifts a box of books 2 meters with a force of 45 N. He then carries the box 10 meters to the living room. What is the

Alisiya [41]

Answer:

90J

Explanation:

The only time work is being done is when he lifts the box off the ground. Therefore, using the work formula, 2 x 45, you get 90J. Hope this helps someone.

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3 years ago

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nydimaria [60]

<span>An organism that is being harmed by the parasite is a _________?
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Answer- It is called a host

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3 years ago

PLEASE HELP I HAVE FINALSSS

vitfil [10]

Answer: 26.67 m/s

Explanation:

Given

Length traveled by the ball $s=40\ m$

Time taken to reach the goal post is $t=3\ s$

Initial velocity $u=0\ m/s$

Using the second equation of motion

$\Rightarrow s=ut+\frac{1}{2}at^2\\\Rightarrow 40=0+\frac{1}{2}a(3)^2\\\Rightarrow a=\frac{80}{9}\ m/s^2\\$

Now using

$\Rightarrow v^2-u^2=2as\\\\\Rightarrow v^2-0=2\times \frac{80}{9}\times 40\\\\\Rightarrow v=\sqrt{\dfrac{80\times 80}{9}}=\dfrac{80}{3}\\\Rightarrow v=26.67\ m/s$

The velocity of ball will be 26.67 m/s

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3 years ago

PLEASE HELP!!! When you lift a book from the ground to your desk, what kind of work do you do, negative or positive? By lifting

Snowcat [4.5K]

When someone lifts a book from the ground, the work you use is positive. By lifting the book, you change it's energy and it's original place The book gains, kinectic energy.

Hope I helped.

8 0

3 years ago