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3 years ago

Select the statement that best describes gravity.

Physics

1 answer:

pav-90 [236]3 years ago

6 0

Explanation:

Gravity is the force of attraction between two objects. It depends upon the mass of the objects and the distance between the objects. Mathematically, the force of gravity is given by :

$F=G\dfrac{m_1m_2}{d^2}$

Where

G is the universal gravitational constant

$m_1\ and\ m_2$ are masses

d is the distance between two masses

So, statement (2) describes gravity "Gravity is the force of attraction between two objects; it is dependent upon the mass of the objects and the distance between the objects".

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Alex17521 [72]

Answer:

$s=(15-x)m$

Explanation:

Let the distance from spotlight to wall be 15m, and distance from the man to the building be $x$ .

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Hence, height of the shadow is expressed as s=(15-x)m

#See attached photo for illustration

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3 years ago

A moving rope (parallel to the slope) is used to pull skiers up the mountain. If the slope of the hill is 37" and friction is ne

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Since rope is parallel to the inclined plane so here we can say that net force parallel to the person which is pulling upwards must counterbalance the component of weight of the person.

Now here we will do the components of the weight of the person

given that weight of the person = 500 N

now its components are

$W_x = 500 cos37$

$W_y = 500 sin37$

now here as we can say that one of the component is balanced here by the normal force perpendicular to plane

while the other component of the weight is balanced by the force applied on the rope

So here the force applied on the rope will be given as

$F = W_y = 500 sin37$

$F = 300 N$

so it apply 300 N force along the inclined plane

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3 years ago

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kolbaska11 [484]

B would be the answer to this

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A car accelerates from 30 m/s to 50 m/s in 2 seconds. Calculate the cars acceleration

masha68 [24]

Answer:

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3 years ago

A train moving at a constant speed on a surface inclined upward at 10.0° with the horizontal travels a distance of 400 meters in

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Vv=80*sin(10)=80*0.1736=13.888 m/s.

So the vertical component of the velocity of the train is Vv=13.888 m/s.

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3 years ago