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3 years ago

The radius of The moon is one_fourth and its mass is one eighty-first that of The earth. If The acceleration due to gravity on T

he surface of The earth is 9.8m/s square what is its value on The moon surface (pls ans that for me)...

Physics

1 answer:

77julia77 [94]3 years ago

7 0

$g_{moon} = g_{earth}* \frac{( \frac{1}{81} )}{ (\frac{1}{ 4^{2}})} = g_{earth} * \frac{16}{81} = 9.8*16/81= 1.935$

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What is vector quantities?

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Answer: Vector quantity is a measurement that has both magnitude and direction.

Explanation:

Vector quantity is a measurement that has both magnitude and direction. Examples are force, acceleration, displacement and velocity.

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3 years ago

An object has a position given by r = [2.0 m + (5.00 m/s)t] i^ + [3.0m−(2.00 m/s2)t2] j^, where all quantities are in SI units.

makkiz [27]

Answer:

Acceleration of the object is $4\ m/s^2$ .

Explanation:

It is given that, the position of the object is given by :

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Using the property of differentiation, we get :

$a=\dfrac{d^2r}{dt^2}=-4\ m/s^2$

So, the magnitude of the acceleration of the object at time t = 2.00 s is $4\ m/s^2$ . Hence, this is the required solution.

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3 years ago

A 2.0-kg mass is oscillating about the origin at 24 rad/s. The amplitude of the oscillations is 0.040 m. At what position is the

Darya [45]

Answer:

0.0327 m

Explanation:

m = 2 kg

ω = 24 rad/s

A = 0.040 m

Let at position y, the potential energy is twice the kinetic energy.

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The kinetic energy is given by

K = 1/2 m x ω² x (A² - y²)

Equate both the energies as according to the question

1/2 m x ω² x y² = 2 x 1/2 m x ω² x (A² - y²)

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3y² = 2A²

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y = 0.82 A = 0.82 x 0.040 = 0.0327 m

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3 years ago

A block is at rest on a plank whose angle can be varied. The angle is gradually increased from 0 deg. At 31.8°, the block starts

galina1969 [7]

Answer:

$\mu_s = 0.62$

$\mu_k = 0.415$

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Explanation:

First, we will calculate the acceleration using the kinematics equations. We will denote the direction along the incline as x-direction.

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3 years ago

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anzhelika [568]

The forces would be gravity and friction

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3 years ago