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dedylja [7]
2 years ago
11

If the mass of the earth and all objects on it were suddenly doubled, but the size remained the same, the acceleration due to gr

avity at the surface would become.
Physics
1 answer:
timofeeve [1]2 years ago
7 0

When the mass of Earth doubles, acceleration due to gravity doubles as well.

<h3>Acceleration due to gravity</h3>

Apply Newton's second law of motion;

F = mg --- (1)

where;

  • m is mass of the object
  • g is acceleration due to gravity

F = GmM/R²  --- (2)

where;

  • M is mass of Earth
  • R is radius of Earth

Solve (1) and (2)

mg =  GmM/R²

g = GM/R²

when the mass of Earth doubles, acceleration due to gravity becomes;

g' = G(2M)/R²

g' = 2(GM/R²)

g' = 2g

Thus, when the mass of Earth doubles, acceleration due to gravity doubles as well.

Learn more about acceleration due to gravity here: brainly.com/question/88039

#SPJ1

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A uniform plank of length 5.0 m and weight 225 N rests horizontally on two supports, with 1.1 m of the plank hanging over the ri
lawyer [7]

Answer:

x = 0.6034 m

Explanation:

Given

L = 5 m

Wplank = 225 N

Wman = 522 N

d = 1.1 m

x = ?

We have to take sum of torques about the right support point.  If the board is just about to tip, the normal force from the left support will be going to zero.  So the only torques come from the weight of the plank and the weight of the man.

∑τ = 0  ⇒     τ₁ + τ₂ = 0  

Torque come from the weight of the plank = τ₁

Torque come from the weight of the man = τ₂

⇒  τ₁ = + (5 - 1.1)*(225/5)*((5 - 1.1)/2) - (1.1)*(225/5)*((1.1)/2) = 315 N-m (counterclockwise)

⇒  τ₂ = Wman*x = 522 N*x   (clockwise)

then

τ₁ + τ₂ = (315 N-m) + (- 522 N*x) = 0

⇒  x = 0.6034 m

7 0
2 years ago
Complete the sentence to describe what a wave is and what it does. A wave is a disturbance that carries from one place to anothe
kozerog [31]

Answer:

Energy

A wave is a disturbance that carries energy from one place to another through matter and space.

Explanation:

A wave can be defined as a form of disturbance that carries energy from one place to another through matter and space.

The energy of wave depends on the frequency of the wave and the wavelength (lambda) of that particular wave.

Mathematically,

V = f × lambda

5 0
3 years ago
Read 2 more answers
Select all that apply.
ikadub [295]
All are true except the first two.
6 0
3 years ago
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During a shock which lasts 10ms (0.01s), the voltage difference between the electrodes (so the drop in potential across all thre
natta225 [31]

Answer:

20000 W

Explanation:

Power: This can be defined as the rate at which energy is dissipated or used. The S.I unit of power is Watt(W).

The expression of power is given as,

P = E/t.............................. Equation 1

Where P = power, E = Energy, t = time.

Given: E = 200 J, t = 0.01 s

Substitute into equation 1

P = 200/0.01

P = 20000 W.

Hence the average power = 20000 W

5 0
3 years ago
What type of energy does friction produce?
VMariaS [17]

Answer:

The correct option is A = adiant negy.

6 0
2 years ago
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