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guapka [62]
3 years ago
8

Which statement best describes the direction of the buoyant force on any object?

Physics
2 answers:
nika2105 [10]3 years ago
6 0

Answer:

The path of the object is restricted to an elliptical orbiting pattern due to gravity.

This is another answer for the same question but rewritten

Explanation:

poizon [28]3 years ago
5 0

The buoyant force on any object acts in the direction opposite to the force of gravity.  <em>(A)</em>

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An astronaut has become detached from her spaceship. She's floating in space holding a wrench. She's 50 m from her current locat
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She throws the wrench in the opposite direction of her destination and the resulting backward force should be enough to get her back to the station.

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Evapotranspiration moves water from _______.
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Earth's land and ocean surface to the atmosphere.
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At the circus, a 100-kilogram clown is fired 15 meters per second from a 500-kilogram cannon. What is the recoil speed of the ca
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Recoil speed= 3m/s, method shown in photo

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A stone is dropped from the upper observation deck of a tower, 250 m above the ground. (Assume g = 9.8 m/s2.) (a) Find the dista
Vitek1552 [10]

(a) y(t)=250 - 4.9 t^2

For an object in free-fall, the vertical position at time t is given by:

y(t) = h + ut - \frac{1}{2}gt^2

where

h is the initial vertical position

u is the initial vertical velocity

g = 9.8 m/s^2 is the acceleration of gravity

t is the time

In this problem,

h = 250 m

u = 0 (the stone starts from rest)

So, the vertical position of the stone is given by

y(t) = 250 - \frac{1}{2}(9.8) t^2 = 250 - 4.9 t^2

(b) 7.14 s

The time it takes for the stone to reach the ground is the time t at which the vertical position of the stone becomes zero:

y(t) = 0

Which means

y(t) = h - \frac{1}{2}gt^2=0

So for the stone in the problem, we have

250 - 4.9 t^2 = 0

Solving for t, we find:

t=\sqrt{\frac{250}{4.9}}=7.14 s

(c) -70.0 m/s (downward)

The velocity of an object in free fall is given by the equation

v(t) = u - gt

where

u is the initial velocity

g = 9.8 m/s^2 is the acceleration of gravity

t is the time

Here we have

u = 0

So if we substitute t = 7.14 s, we find the velocity of the stone at the time it reaches the ground:

v=0-(9.8 m/s^2)(7.14 s)=-70.0 m/s

The negative sign means the direction of the velocity is downward.

(d) 6.94 s

In this situation, the stone is thrown downward with an initial speed of 2 m/s, so its initial velocity is

u = -2 m/s

So the equation of the vertical position of the stone in this case is

y(t) = h + ut - \frac{1}{2}gt^2=250 - 2t - 4.9 t^2

By solving the equation, we find the time t at which the stone reaches the ground.

We find two solutions:

t = -7.35 s

t = 6.94 s

The first solution is negative, so it has no physical meaning, therefore we discard it. So, the time it takes for the stone to reach the ground is:

t = 6.94 s

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2 years ago
Justin is standing in the tee box and swings the golf club. As he swings, the end of the golf club gains speed and _____________
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Potential energy is gained here as he swings.

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Read 2 more answers
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