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Olin [163]
3 years ago
15

Can a body be in equilibrium if only one external force act on its ? explain

Physics
1 answer:
Mariulka [41]3 years ago
4 0

Answer:

Explanation:

If there is only 1 force, the body can never be in equilibrium, providing that the force is not zero (and that would hardly be a force. Zero is possible in math and it means something. It is debatable in physics).

You cannot think of a condition where something is stationary on planet earth and there are not 2 forces or more forces involved.

Think of something like a block of wood sitting on a table. It is not moving, we'll say. Gravity is holding it down, but what is pushing up on it?

The table is. There are 2 forces and they are equal in magnitude, but opposite in direction. That matters.

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You are working in the movie industry. The director of a western film has come up with an impressive stunt and has asked you to
Delicious77 [7]

Answer:

  x = 10.53 m

Explanation:

Let's analyze this problem a bit, the time that the cowboy must take to fall must be the time that the horse takes to arrive

Let's start by looking for the cowboy's time, which starts from rest and the point where the chair is is y = 0

           y =y₀ + v₀ t - ½ g t²

           0 = y₀ - ½ g t²

           t = \sqrt{ \frac{2 y_o}{g} }

we calculate

           t = √(2 3.22 / 9.8)

           t = 0.81 s

the horse goes at a constant speed

           x = v_{c} t

           x = 13 0.81

           x = 10.53 m

this is the distance where the horse should be when in cowboy it is left Cartesian

3 0
3 years ago
The strength of an electric field depends on the
KengaRu [80]
<span>The correct option is D) both A and B. In fact, the strength of an electric field produced by a single point charge is given by
</span>E=k  \frac{Q}{r^2}<span>
where Q is the charge that generates the field, k is the Coulomb's constante and r is the distance from the charge source of the field.

From the equation, we see that the strength of the field depends on A) the amount of charge that produced the field (Q) and B) the distance from the charge (r), so the correct option is D.</span>
5 0
3 years ago
Read 2 more answers
How much work is required for a 74 kg sprinter to accelerate from rest to 2.2 m/s?
My name is Ann [436]

Answer:

179.1 kg

Explanation:

7 0
2 years ago
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The study of origins and life of the planet earth is called
Luden [163]
Abiogenesis is the name of life on Earth.
8 0
4 years ago
What is a charge-coupled device (CCD), and how is it used in astronomy?
Sedaia [141]

Answer:

Charge-coupled device  (CCD) is a device that receives and transfers an electrical charge to the next region

Explanation:

Charge-coupled device  (CCD) is a device that receives and transfers an electrical charge to the next region where it can be modified like changing it to a electronic value.

In astronomy, high-powered telescopes can be used with CCD device image sensor cameras. The imaging system can concentrate for a number of hours on one place in space once the Earth's rotation synchronizes with the telescope.

6 0
4 years ago
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