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4 years ago

How strongly the planet you're on Pulls on you

Physics

2 answers:

garik1379 [7]4 years ago

6 0

The mass is very heavy compared to the moon so the weight is pushing u down 18 lb

astra-53 [7]4 years ago

5 0

The two equal and opposite forces that attract you and the
planet you're on toward each other are caused by gravity.

The force that pulls you toward the planet is what we call
your "weight".

The force that pulls the planet toward you is equal to your
weight. Nobody ever talks about that one.

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If a horse does 4000j of work over 20m how much force does the horse use

zlopas [31]

Hello! My name is Zalgo and I shall be helping you out on this mystical day~! The answer that you are looking for is... "In physics, a force is said to do work if, when acting, there is a displacement of the point of application in the direction of the force. It is calculated by the formula W = f x d. Therefore, we calculate the problem above as follows:

W = f x d

4000 = f x 20

f = 200 N"

I hope this answer helps! :P

"Stay Brainly and stay proud!" - Zalgo

(By the way, can you give me Brainliest? I'd greatly appreciate it, Thank you! X3)

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4 years ago

3. A 20 kg lawnmower is pushed by its handle, which makes a 40 degree angle with the horizontal. What

Mkey [24]

<u>13788 J is required to finish the work.</u>

Explanation:

Given that,

Mass of lawnmower is 20 kg

Force = 30 N

$\text { Angle }(\theta)=40^{\circ}$

Displacement ( distance moved )= 20m

The force of 30N is applied along the direction of motion and was applied for the whole 20 m.

The formula of work done for one pass is

$\text { Work done }=\text { force } \times \text { displacement } \times \cos \theta$

Substituting the given data into the formula,

$W=30 \times 20 \times \cos 40^{\circ}$

$\mathrm{W}=600 \times \cos 40^{\circ}$

$\mathrm{W}=600 \times 0.766$

W = 459.6 J

Work done for one pass = 459.6J

Now, work done for 30 passes is calculated by multiplying the work done for one pass into 30.

$\text { Then the work done for } 30 \text { passes is } 459.61 \times 30=13788 \mathrm{J}$

Work is done by the person pushing the mower to finish the work is <u>13788 J</u>.

5 0

3 years ago

Why are animal cells square and animal cells round

irina [24]

Plant cells are not necessarily square, but they due tend to have distinct edges and be kind of rectangular. This structure is caused by the cell wall which is very rigid and therefore forces the cell to have a more defined shape. However, animal cells do not have a cell wall but only the plasma membrane. Which is is why it's round.

3 0

3 years ago

What is the impact force on a 0.5 kg object if it falls 3 meters and hits a carpeted floor at 8 m/s, stopping in 0.10 seconds?

Cerrena [4.2K]

the I'm pact force of 0.5 is lol u guys go and study why r u asking answers

4 0

3 years ago

A 45.8-kg girl is standing on a 151-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, flat sur

erik [133]

Answer:

a. 1.12m/s

b. 0.34m/s

Explanation:

Let Vgi = the velocity of the girl relative to the ice

Let Vgp = the velocity of the girl relative to the plank

Let Vpi = the velocity of the plank relative to the ice

Vgi = Vgp + Vpi

From the question, Vgp = 1.46/s

So, Vgi = 1.46 + Vpi

Conservation of Momentum (Relative to the ice), we have

Initial Momentum = Final Momentum

Because the girl and the plank are at rest initially, the initial Momentum = 0

So, 0 = Mg * Vgi + Mp * Vpi

Where Mg = Mass of the girl = 45.8kg

Mo = Mass of the Plank = 151kg

Make Vpi the subject of the formula, we then have

-Mg*Vgi = Mp*Vpi ---------- Divide through by Mp

Vpi = -Mg * Vgi/Mp

Vpi =( -45.8 * Vgi)/151

Vpi = -45.8Vgi/151

Remember that, we have (Vgi = 1.46 + Vpi)

We then substitute the expression of Vpi in the above equation

That is;

Vgi = 1.46 + (-45.8Vgi/151) ------- Open the bracket

Vgi = 1.46 - 45.8Vgi/151 ----------- Multiply through by 151

151 * Vgi = 151 * 1.46 - 45.8Vgj

151Vgi = 220.46 - 45.8Vgi --------- Collect like terms

151Vgi + 45.8Vgi = 220.46

196.8Vgi = 220.46 --------------- Divide through by 196.8

Vgi = 220.46/196.6

Vgi = 1.1213631739572736

Vgi = 1.12 m/s (Approximated)

So, the velocity of the girl relative to the ice is 1.12m/s

b. Velocity of the plank, relative to the ice

We can solve this using (Vgi = 1.46 + Vpi)

All we need to do is substitute 1.12 for Vgi in the equation

So, we have

Vgi = 1.46 + Vpi becomes

1.12 = 1.46 + Vpi -------- Collect like terms

1.12 - 1.46 = Vpi

-0.34 = Vpi

So, the Velocity of the plank is 0.34m/s to the left

3 0

4 years ago

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