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Rufina [12.5K]
4 years ago
15

Children are told to avoid standing too close to a rapidly moving train because they might get sucked under it. Is this possible

? Explain.
Physics
1 answer:
storchak [24]4 years ago
4 0

Answer:

no its not like the undertow in the ocean

Explanation:

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Please help. what's the answer??
Anvisha [2.4K]
I THINK it is C. KEYWORD is THINK
5 0
3 years ago
A soccer goal is 2.44 m high. A player kicks the ball at a distance 13 m from the goal at an angle of 40°, and the ball just hit
Vera_Pavlovna [14]

Let <em>v</em> denote the initial speed of the ball. The ball's position at time <em>t</em> is given by the vector

\mathbf r(t)=v\cos40^\circ\,t\,\mathbf i+\left(v\sin40^\circ\,t-\dfrac g2t^2\right)\,\mathbf j

where <em>g</em> is the acceleration due to gravity with magnitude 9.80 m/s^2.

The ball reaches the goal 13 m away at time <em>t</em> such that

10\,\mathrm m=v\cos40^\circ t\implies t=\dfrac{10\,\mathrm m}{v\cos40^\circ}

at which point it attains a height of 2.44 m, so that

2.44\,\mathrm m=v\sin40^\circ\left(\dfrac{10\,\mathrm m}{v\cos40^\circ}\right)-\dfrac g2\left(\dfrac{10\,\mathrm m}{v\cos40^\circ}\right)^2

2.44\,\mathrm m=(10\,\mathrm m)\tan40^\circ-\dfrac12\left(9.80\dfrac{\rm m}{\mathrm s^2}\right)\left(\dfrac{100\,\mathrm m^2}{v^2\cos^240^\circ}\right)

\implies\boxed{v\approx3.75\dfrac{\rm m}{\rm s}}

6 0
4 years ago
Why does Newton's law of universal gravitation apply to all objects in the universe? Explain.
gizmo_the_mogwai [7]
Newton's law of Universal Gravitation tells that Force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

As there is mass for every object, and they are separated by certain distance (from 1 cm to more than hundreds of light years), they exerts Gravitational force on each other

Hope this helps!
5 0
3 years ago
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The nucleus of an atom can have either a positive or negative charge true false?
deff fn [24]

False because nucleus just consists proton which is positively charged and neutron which is neutral. It does not contain electron , so nucleus only can be positive charge

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3 years ago
Why would geothermal energy NOT be a possible energy source for many regions of the country?
Alex787 [66]

Geothermal energy is not always found in an area that is easily accessible. <em>(C)</em>

3 0
3 years ago
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